Based on the understanding and knowledge of following up with the cryptocurrency for the past 6 month, my inference is that the cryptocurrency is highlt volatile.
Is it a good approach to stay invested for long term in the altcoin space?
Maybe you should try it so you can feel how long-term investments in altcoins are. I once made a big profit because I held the coins I got from bounty up to 5 times the price compared to before going up.