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.
I agree, in the present day btc is the most important especially today because we are in the generation of high tech as bitcoin is an digital money. Except that its a big opportunity to everyone that it can gives extra income and its easy to invest anytime. We have more to learn also.