I’m not sure about bitcoin as basis for a significant transactional currency. It seems inefficient and if done in the purist way seems too place too much demand on users to secure their own assets.
I like the concept of Blockchain for more general applications though, e.g. contracts and other documents where authenticity is important.
Having said that I do hold cryptocurrency with no intention of selling in the near future. To answer one of the questions in your earlier post, what it has going for it at the moment is significant institutional interest. This is the first time in its history this has happened.