Unless you already have some rigs, don't invest in mining as it's way too risk to get your money back. It's less hassle just to buy some coins and hope prices will go up one day. I used to do mining back in 2013-2014 but I had quit because there were many troubles. Had I keep coins mined in 2013-2014 though, I would be rich!! But no miners mine coins just to keep for several years, they have to pay electricity!