Every crypto compliance program eventually hits the same wall: there are hundreds of live blockchains, and you cannot monitor all of them properly on day one. Screening tools, analytics vendors and internal review capacity all have limits. So the real question is not "which chains exist?" but "which chains does my business actually touch, and in what order should I build coverage?" This is a prioritisation exercise, and it pays to be deliberate about it rather than defaulting to whatever your analytics provider switched on first.
Start from exposure, not from the coin list
The single best predictor of where your risk lives is where your customers already are. Before ranking any chain by reputation, pull your own numbers:
- Which networks do deposits and withdrawals actually settle on?
- Which assets make up the bulk of your volume, and which chains carry them?
- Where do your highest-value or highest-velocity accounts transact?
A chain that carries 40% of your withdrawal value deserves first-class coverage even if it rarely makes headlines. A famous chain you barely touch can wait. Exposure-weighted prioritisation keeps you honest: you are protecting the flows that a supervisor or auditor will actually ask about.
Follow the stablecoins
If your exposure data is thin or you are launching something new, one pattern holds almost everywhere. Stablecoins now dominate both legitimate and illicit on-chain value. Chainalysis reported that stablecoins accounted for roughly 63% of illicit transaction volume in 2024, overtaking Bitcoin, which had been the criminal asset of choice through 2021 (Chainalysis, 2025 Crypto Crime Report).
In practice this means the chains that host high stablecoin throughput tend to matter first. Tron and Ethereum carry enormous USDT and USDC volume, so for most euro-facing businesses they belong near the top of the list. If you support stablecoins at all, the chains they settle on are not optional coverage.
The three-factor screen
A workable way to rank candidate chains is to score each one on three axes and cover the top scorers first.
| Factor | Question to ask | Why it matters |
|---|---|---|
| Customer exposure | How much of my real volume touches this chain? | Concentrates effort where breaches actually hurt |
| Liquidity | Is there enough depth for it to move meaningful value? | Thin chains carry less laundering risk per unit of effort |
| Traceability | Can my tools attribute addresses, clusters and flows here? | Determines whether coverage is real or cosmetic |
Traceability is the factor teams underweight most. A transparent, well-indexed ledger where reputable analytics vendors offer strong attribution gives you genuine investigative reach. A chain with weak tooling, or a privacy-preserving design that breaks address clustering, means any "coverage" you claim is shallow. It is better to be honest that a chain sits outside your monitored perimeter than to pretend you can trace what you cannot.
Tiering, not a single line
Rather than a binary in/out decision, group chains into tiers:
- Full coverage. High exposure, deep liquidity, strong traceability. Real-time screening, address risk scoring, and alerting on inbound and outbound flows.
- Monitored. Moderate exposure or emerging volume. Coverage in place, thresholds and review cadence lighter than tier one.
- Restricted or watchlist. Low exposure or poor traceability. You may block deposits, cap exposure, or apply enhanced due diligence rather than routine monitoring.
Document the tier each chain sits in and the reason. When your exposure shifts, a chain moves tier, and you have an audit trail showing you made a risk-based choice.
Bring the regulation into the ranking
Prioritisation is not purely a risk-appetite exercise in the EU. Under the Markets in Crypto-Assets Regulation (MiCA) and the recast Transfer of Funds Regulation, crypto-asset service providers must attach and verify originator and beneficiary information on transfers, the so-called Travel Rule (ESMA on MiCA). Chains where you cannot reliably identify counterparties or support Travel Rule messaging create obligations you may struggle to meet. That regulatory friction is itself a prioritisation signal: it can push a chain down your list, or off it, regardless of how popular it is.
Review the list on a schedule
Chain prioritisation is not a one-time architecture decision. Asset issuers migrate, new networks capture stablecoin flow quickly, and your own customer base drifts. Set a recurring review, quarterly is a sensible default, that re-scores your chains against fresh exposure data and any new regulatory guidance. Treat the list as a living control, and tie changes back to the evidence that drove them.
Where Seqlense fits
Once you have decided which chains matter, the work becomes operational: watching addresses, scoring risk and catching alerts before value leaves. Seqlense Monitoring covers on-chain address surveillance and risk scoring, while the Investigation service supports deeper tracing when an alert needs to become a case. On the rule-making side, the Doc regulatory watch keeps MiCA, TFR and supervisory guidance in view using filters like doctype:regulation and source:ESMA, so your coverage decisions stay aligned with the obligations that actually bind you.