You should not invest on these coins because they don't have bright future instead of you can invest in strong projects like solana, polkadot, Ethereum etc. Because their team is very strong and they are having working products in the market.
each traders have their own reason why they invest in those coins, beside fundamental they also recognized speculation that hopefully wil give them alot profits when altcoin season coming again.
XRP and TRX havent reached yet their all time highs and their value so far is a good entry price and I have a strong feeling that this altcoins will pump massively before the end of this bullish cycle.
its be one good reason to invest in these coins, there are gap that need to filled when altseason coming again.