Invest in bitcoin mining you can earn a lot but it depend in h/s that also depend in you hardware you buy it a great ways to earn bitcoin also we know that it getting harder to mine because of so many miner's this days but still a great ways.
investment in mining would be only good if you do it in a proper and large way. the mining equipment and electricity cost thousands of $$.. so if you really wanna make profit than you have to do it on a large bases.