>>1024125Probably two. A decent road bike, and a decent MTB one. If you want to commute take the bus/tram/subway/walk. If you want to ride on trails/mountain pick the mtb, if you want roads take the road bike.
Having many bikes can be nice, but probably unnecessary. I personally have a couple of bikes, one ghetto folding bike for commuting and a road bike for leisure rides (not 20km leisure rides at the park like the reddit ones, i mean at least 60-70km rides at a decent pace.)
I'm tempted about buying a hardtail but I think that MTB is not suitable for me at the moment, not enough space and mtb bikes can be dirty so It could be bad because I take my bikes into my house and I don't want to clean mud from my floor.