Thats hardly its main motivation, banks have been preventing double spend for a long time now. The motivation behind the blockchain is to have a distributed led

Thats hardly its main motivation, banks have been preventing double spend for a long time now. The motivation behind the blockchain is to have a distributed ledger thats not controlled by a single party and thus cannot be taken down or controlled by governments. The problem is that it's very good at that but nothing else, so if you're doing something legal or supported by the banking structure of your country, the blockchain is by far a worse solution in every way. The best blockchain got so far was Bitcoin and such as a horse betting platform, basically another stock to bet on and thus its recent popularity. Aside from that Its hard to see a continued use, maybe as conservative governments keep increasing protectionism and divisiveness we'll get more use out of it.