People spend time in bitcoin because it is an opportunity to earn in a fastest and easy way. It was proven by many people that there is a profit in bitcoin and others become rich through it. And i believe people doesn't think bitcoin as a waste of time rather a great opportunity to earn.
Bitcoin is a great opportunity for me, spending time to working not is wasted cause it give chance to earn profit and I know lots of investors of bitcoin have proven that and become rich. I believe Working in bitcoin is a good choice a great opportunity for us and not wasted time cause it gives high profit and brighter future.