I will answer you with an old saying:
the best time to buy was when he was just out on the market or Now.
When you first saw it cost 300 satoshi but when I saw it I was 50 and a few days ago it came to 3,700 while it now dropped to 1,600.
Who says that in 3 months will not be 7,000 or 20,000 satoshi.
Look at the project, team, dev and community, and you like to buy and hold!
Completely agree with you, mate. Investing into PoS coins when their prices are extremely low, is an ideal move towards expanding your capital in the long term. As most of these cryptocurrencies experience high uptrends in price, they make it the ideal opportunity for holding into your wallet for quite some time.
As long as you look deeply into the project's community and development team, you'll find the perfect choice towards growing your money tenfold.
Right now, there are many attractive options on the market from PoS coins with high stake rates, to those with very limited supply. If you were to choose among the most popular ones those would be RAIN, TRI, JAPAN, and DMD. Just my opinion.
