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, because today every people was suffer from poverty and even the countries the economy is bad. So we should only spend more time in bitcoin, because it can gives more chance to the people earn and more opportunity to invest also. Especially to those people who has a capital that they want to invest and to learn more some knowledge about bitcoin.