No Altcoin should be kept in long-term wallets. We have seen the clearest examples of this in the past. People invest their money in the coins they trust very much, and they can't even get half of that money after years. You have to be careful.
Yeah anyone must be careful when investing in the new tokens or altcoins. There are so many projects that can become a trap for us. The problem is sometime people didn't know whether the developers can be trusted or not. They are always believing with what they have invested and they abandon the fact that if the developers behind their tokens were so shady.