Of course better Bitcoin than Altcoin. That's because Bitcoin is definitely profitable and many people have been successful because of Bitcoin. Many people have earned a lot of money from Bitcoin. On the other hand, I always hesitate with Altcoin. I do not want to buy or set aside any money for Altcoin.
But wait, do not get me wrong first. I do not trust Altcoin completely, but I can use Altcoin for another opportunity that is mining. I may not be able to compete with Bitcoin miners. But I'm sure I can still be part of the miner Altcoin. The best and most suitable Altcoin example to target is Ethereum. Hope it works.