Just diversify if you aren't decided
Maybe 40% ADA, 30% XRP and 30% for another asset… maybe Doge. This will reduce the risk of you losing out in case something bad happened to XRP. ADA really preformed so well in the last Bull run and I believe it will continue to get a new all-time high in the next one.
As for XRP, there was no new all-time high from the one of 2018
Look at the charts and see which asset looks good
https://talkimg.com/images/2023/05/14/blob61db57d983e329f5.png