In terms of multiplying their money they're probably better off buying XRP than bitcoin, because XRP is more likely to hit its ATH (all time high) of $3 (3x current price) than bitcoin is to reach $150k, which is more than twice its previous ATH. Though I do have a feeling things will go insane again with all cryptos at the end of the year/start of next year.
You could also say the same about other cheap coins, for example Dogecoin is probably more likely to hit its ATH of 68 cents (3x) again than bitcoin is to hit $150k. $2000 could have bought 800,000 DOGE a year ago, vs 0.2 BTC. Your $2k would have become about $12,000 with BTC earlier in the year, so you wouldn't have lost out, but it was $550,000 with dogecoin, and even now it's $160k (DOGE) vs $8k (BTC).
That's why everyone is looking at other low price coins, even obvious scams or things under legal investigation. Outside all the hype and BS, crypto is nothing but people trying to get rich without any effort, buying something cheap and hoping it Moons.
XRP crashed to about 15 cents due to speculation about the SEC at the end of last year/start of this year, but was pumped back up during cryptomania. Even the most blatant and obvious scam coins are bought by people hoping to bail out before the rug is pulled, leaving someone else with the bill.
Long term it probably doesn't matter, since all the majors tend to rise, what matters is not putting your money into a coin that has no future. So BTC, ETH, XRP, DOGE, even LTC, and then maybe a few others other people talk about that I don't know much/anything about. Maybe also BNB or Monero. Veteran or established coins with a solid foundation, users and enthusiasts.
As for domains? Irrelevant IMO. Unless you have XRP.com, or maybe .IO or .AI or something popular, I'd say don't bother. XRP is not a new coin, it's from 2012 I think. Even bitcoin domains don't necessarily sell for that much.
An exception might be new things, like NFT, but even then 99.9999999999% of NFT names will drop next year or the year after, unsold, and as with every fad, most of the buyers are just domain speculators, not end users.
TL;DR: If you have $2000 to spend, you'll make more buying XRP than buying XRP domains.