A new survey reveals the gulf between demand for cryptocurrencies, and advisers’ willingness to advise on them.

Wisdomtree found that 72 percent of UK advisers had spoken to their clients about investing in cryptocurrencies, with almost half of clients (45 percent) intending to step outside of their adviser relationship to allocate to the asset class.

The survey polled 600 professional investors across Europe, ranging from wholesale financial advisory firms...