Yeah you're right.
Forget it mate, stick five thousand quid into a flawed technology with major security issues and whose support is currently getting dropped by the mainstream because you reckon it might be worth half a million in the future. Much better than diversified portfolio over low risk ventures returning small gains for a longer period. Do that. Shoot for the Moon. This time next year Rodders, you'll be a millionaire.
I'm not going to be buying Bitcoin. But advising an ISA that is paying an interest rate which is lower than inflation????