What exactly are you looking for? An investment? A store of wealth? A quick trade?
Altcoins are good for quick trades to gain profit but I personally am a bit wary of holding money in any of them for very long. They tend to depreciate over time. They're also quite vulnerable to hacks and can easily be taken over. They're not exactly the safest asset.
Bitcoin, however, has a longer term security that is promising. I'd be comfortable leaving my money in there for years. No one is going to attack it, and it's decentralized. What more can you ask for?
Good set of questions to ask oneself when being involved with crypto. And the fact is,,, most people are here to make money, and make money quickly. Altcoins of course swing wildly, more so than Bitcoin, so very tempting to see it as "quick profits" potential but equally easy to see it as "quick losses" potential.
The fact that most tokens are so centralized is the biggest risk to me. Anything can happen if the devs leave. Which is why I still take my risks, but always limited, and must have a long term view in mind.