Since you have been involved in the forum for several months, you must have researched Bitcoin and other coins in depth. Choosing an alt coin for investment is not bad if the coin is of good quality. The price of Polkadot coin today is above $7 and the coin is one of the top 20 coins.  Polkadot Coin has not grown much for a long time but has the potential to grow in the future. If I had to invest in altcoins, I would choose the above coins where possible, like Ether, BNB, Sol. Choose coins to invest in that are the least risky.

Its been a while when I heard anything big news on polkadot. I think they had been surpass by other L2 projects in terms of users, really gotten hype before especially on parachain projects but it seems more and more users are liking L2 and than the polkadot ecosystem.

Maybe for trading purposes its still got a lot of upside but for ecosystem not sure.