As per my understanding Bitcoin is just small part of blockchain technology as a whole (like email vs Internet) Whatever goes with BTC blockchain will be a disruptive technology in the future.
Everyone has the right to free speech, and you can say your opinion on any issue.
I think the best use of bitcoin is investment, not diversion.
Yes everyone has every right to speach but we should be aware of what we are saying. It may be positive to you but negative in the perspective of others.
Bitcoin is never useless. It had been so helpful for people who are economically and financially unstable. This is used for investment and even payment.