Litecoin is where I first invested in 2017 and I made some good money from it. I don’t trust XRP, never have. But your friend might be right. It’s dipped enough that you could make a solid profit if they win and exchanges re-list the coin. I would just consider the timeframe of how long these cases take. Is it over a few years? If so, you may want to look elsewhere. These runs have a habit of launching and then dropping dramatically. There could be better options in other places. Another thing to consider is that XRP is a cheap entry. Someone drops $500 and next thing you know they’re the worlds biggest fanboy.
I think the Top 30 has a list of shitcoins in there that all might make some money but will eventually fade out as the market becomes more mature. A use case and valuable transactions should be things to consider when looking at crypto investing, especially for those offering BaaS.