Best idea for me currently is doing nothing. Cash and Berkshire.
I am very ignorant about Bit coin but when crowds are in a mania, they will come up with perfectly sounding reasons for doing what they are doing.
It is an excellent book. It is a must read especially if you want to know about the start-up culture in Silicon Valley and how advertising works. I give high marks to the author as he is quite introspective and did not spare himself in his portrayal of what happened.