Just bought more BCH and LTC. I have plenty of BTC and other alts. First time my BTC stash is under 40% of my crypto holdings. I'm all about diversification...
At this stage there are more old school bitcoiners that sank their battleship in shit coins than there are old schoolers left. You have the goose that lays the golden egg and you are willingly giving it up. Not a smart idea. The internet is a winner takes all economy.
You can't see into the future so I don't know how you can claim it's not a smart idea. So far it has worked out and if I exchange my alts back to BTC I'd have more BTC.
Diversifying is not only smart. It is usually more profitable. Get with the program.