These posts seem to crop up a lot for some reason, the answer is simple. If you already have equipment the answer is probably "yes," but you can easily check with a profit calculator (e.g. https://www.cryptocompare.com/mining/calculator/eth)

The question of whether it will be profitable to buy equipment is more complicated, but not by much. Find hashrates for GPUs (or ASICs/whatever) from a site like: https://whattomine.com/
Use a profit calculator to see how long it will take to ROI, and decide whether you think the market will crash in that time.

For example, if you assume Ethereum will retain value for a year (and not switch to POS), it is currently profitable to set up new rigs.