Hi,
I'm new on this forum but I've followed Bitcoin for a couple of years and now I find myself in a particular situation and I wanna now your opinions since it's regarding mining Bitcoin.
Well let's say that I'm living in an apartment in which I do not pay electricity bill, do you think it
Would be profitable and a smart investment to buy Bitcoin Mining hardware and of course Start mining Bitcoin ?
Under this circumstances which miner do you recommend me to buy ?
Or is it a better idea to mine other cryptocurrencies that might be more profitable for a same price hardware ?
Willing to know your opinion

Absolutely not, especially if you live in a large city. Chances are your electrical cost is way way over 0.10$/kWh, and even if it wasn't you'd have problems with roi with an S9. Warming by using the miner during the winter can help electrical bills slightly, though. Eth and alt coin mining might work out for you, possibly, but that's just a maybe and we need to know your electrical costs.