Some latest models of laptops are so powerful and have so great cooling systems, that I think it's pretty normal that some people use them for mining cryptocurrency. The only bad thing, that it's unreal to upgrade them by adding some new components as much as you want, like you can do it with PC.
It’s such a waste if you will used a high end gaming laptop just to mine altcoins which Gives you a cheap profit or sometimes negative profit. Even using a mining rig will not gonna give too much profit unless you have a free electricity. I try to mine before using my gaming rig with GTX 1080Ti, it’s useless because in the long run, your rig will just gonna break and the repair cost will expensive compared on the profit that you get in mining.
Staking is the new profitable mining in altcoins IMHO.