Trading ERC-20 tokens at this time in my opinion is still safe as long as you are not trapped by garbage tokens originating from there, oh yes, some tokens that came from there have been many who have switched and started using other platforms and also some of them make their own mainnet and in my opinion, instead of staying focused on ERC-20 why don't you try the tokens from mainnet that are just circulating? because this is very interesting.
There are thousands of ERC-20 tokens right now and searching for tokens that are suitable for investment would be like looking for a needle in the haystack. In the past, I had invested in several of the ERC-20 tokens, including TMT (Traxia Membership Token), WPPTOKEN, REPME, Mozo Token, and BitScreener. But none of them gave positive returns. IMO, it doesn't matter in which platform the token is being traded. All it matters is the viability and continued development.
There was a time in which people were really excited about investing in all kind of coins since many thought those coins were going to be the future of the market but we know now that is not going to happen, the future belongs to bitcoin and other coins like ethereum, any new coin that wants to compete will have to deal with the first mover advantage that other coins have and that at this point it seems impossible to reverse, as such it is better to save your money since there is no point in investing in those coins anymore.