The Netherlands is pressing ahead with a sweeping rewrite of how it taxes investment wealth, but crypto, gold and foreign-currency holdings are being left on the old regime until at least 2030 — a carve-out that industry groups say could trigger a rapid exodus of digital assets from Dutch platforms.

Under the government’s current proposal, most financial assets such as shares, bonds and options would shift from an annual levy on paper gains to a capital gains tax collected when an investor sells, with the switch targeted for 2028. Crypto-linked exchange-traded products would follow the new sale-based rules. Direct holdings of crypto, gold and foreign currencies, however, would remain subject to the yearly charge on unrealized gains for…