I don't have experience in altcoins, but I have quite an interest in investing in altcoins, but when I hear the news that investing in altcoins is very dangerous because the potential for losses is so big, but I found out on the internet, it turns out that we can invest in altcoins as long as the in quality altcoins,
They're not wrong, altcoins are risky because most of them are new scammy projects. There are old ones, but the profits you'd get aren't as big compared to investing in a completely new project that will grow.
For ETH, I wouldn't really guarantee that it has a good future, any project has really if you think about it. Comparing it to other altcoins though, it has better chances of standing in the future as a big name (if it isn't already is) among cryptos. I myself have kept a part of my portfolio recently into ETH. If you're debating, then going for a DCA method isn't that wrong, especially if we consider how the prospects of ETH is better than other new altcoins out there.