Have to agree with Navala, they are not safe. Even the crooks at the IMF admitted yesterday that 9 of the world's most strategic banks are unsafe.... including Barclays. It is interesting to see Ethereum being adopted mainstream but if you have any choice then buy the asset itself rather than hold it within any fund. If however you can't access your money (trapped within a self-directed pension fund, etc) then the ETN maybe worth a look... but only if you can't free your cash from the pension trap.