TRX is going down like a falling rock now. It is just a matter of time before XRP follows it. These coins purely survive on hype, as they don't have any real life usage. Whales are manipulating the market with these coins and that explains the ongoing pump. But I don't think that it is going to last for more than a few weeks. Those who are looking for investment with altcoins should rather make their moves with BNB, ADA, ETH and DOT. Opting for either XRP or TRX can be a big blunder at this point.
Your advice is very good, but for those who have bought TRX and XRP at low prices before the pump was seen on both, then it is obvious that they are so profitable that some people have said that TRX and XRP are good investments at this point, but they are wrong because they are not necessarily able to last long at a high price.