At the moment investment in new altcoins is very risky and you might end up losing your money. It is always better to invest in established projects that have survived the market for many years. It is better to invest in ETH, XRP, LTC and DOGE, compared to new coins. Although the ROI might not be very high, your investment will be somewhat secure. The majority of the new projects are actually cashing out the market sentiments.
Investment in XRP is also risk, SEC is ruling over it. If Elon stop supporting Doge, it will turned out to be meme project again. All new coins are not risk, proper research needed before investment.
XRP case is already solved, if i'm not wrong XRP is won the case against SEC. But i think you have more safe investment in BTC than XRP. DOGE is always considered as a MEME coin, so what Elon Musk supporting it or not, so you can't trust it like as ETH,LTC & XRP. Some new projects are looking potential but you have to research before investment to avoid SCAM projects.