Provided that there's no active bans for crypto-mining within your state/country, you should be good to go. I reckon that the next couple years will be relatively the same difficulty-wise since there's only so few bitcoins left to be mined and crackdowns left and right are of course expected even with apparent signs of a bull market approaching. In any case, both is profitable, but if you want to have the power in yours hands, I would highly suggest you look into mining bitcoins instead of buying them, gives you the power to earn more if you want to, since I guess electricity's not really going to be a problem given the fact that you pay dirt cheap for lights, and idk, buying bitcoins right now is a little less appealing to many compared to mining (my personal observation).