Most active holders will probably swap. The open question is the wallets nobody is watching.

The numbers are real. One analysis found 561 of the top 1,000 XRP accounts, holding 31.4B XRP, about half of circulating supply, have public keys on record. Today's XRPL signature schemes would be breakable by a large enough quantum computer, which doesn't exist yet.

The plan is also real. The XRP Ledger Foundation's 2027 roadmap, updated Nov 4, proposes ML-DSA-44 post-quantum keys for accounts, validators, and validator list publishers, with no higher base transaction fees. A migration study is scheduled for the first half of 2027, then development, review, and auditing in late 2027 or 2028. Ripple targets full readiness by 2028.

"Swap keys" is easier than it sounds. Under the proposed design, owners assign a new ML-DSA-44 key and disable the old master key. The account and address stay the same, and funds don't need to move. That's a real advantage over networks where coins must go to new addresses.

Keep it in proportion. The roadmap is a plan, not a live upgrade, and the final migration process hasn't been agreed. Nothing requires holders to act now.
My read is that exchanges, custodians, and active wallets will migrate once tools exist, because they have operations teams and incentives. The harder group is dormant wallets: owners who aren't watching, or keys that are lost. Whether they move before 2028 is unknowable, because it depends on awareness, not on the technology.

The risk is slippage, either in the 2027 schedule or in how fast a quantum computer arrives. The supportive case is that XRPL has a clear path and a funded timeline, which many networks still lack.
For traders, it's a 2027 story. It doesn't give a near-term price signal.
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