My Thoughts: The US Dollar is so devalued from the Federal Reserve just printing money over the last 80 or so years why not use a cryptocurrency. The only reason the dollar retains any value is it is backed by the people of the US (Government). People can back cryptocurrencies from all over the world which in turn gives it purchasing power. Right now Bitcoin is the strongest IMO, but I see some others becoming really strong in the near future that don't use the blockchain like hashgraph. The blockchain is to slow in processing which is it's weakness. Hashgraph seems to solve this problem and could be used for stock trading, video games, etc...It's limitless. So, to sum it up I like bitcoin for now because of it's market power, but would keep my eyes open for new technology like hashgraph.