If XRP can increase, I will sell it. But I'm also prepared if the price of XRP can't increase to reach its final ATH and won't be disappointed whatever happens to XRP later. After all, I have also benefited from selling XRP before. And the amount of XRP I have right now is based on the amount of money I can afford to invest in XRP. Everything is still a mystery because we don't know whether XRP can increase again or whether it will remain at its current price. And the only thing to be careful about investing in XRP is all you can do and remember not to spend money you can't afford.
It is unlikely that XRP will renew its ATH in the next few years, but it is a good coin for trading. I would not consider it as a long-term investment because its historical chart shows that for 5 years some investors of this coin continue to be in losses. That's not a good signal for long-term investing. Almost all of the top 20 coins have updated their ATH in 2021, except Ripple.