In my opinion, long-term investment is very good. because if we make investments in the long term, then most likely will get a big profit.
To make a big profit , you need to know what coins you are investing in and always look at the market , as many of the coins die and sometimes it is better to sell and forget about the coin
for long-term investments I don't want to take too much risk by investing in altcoins so I will only invest in Bitcoin if it's for the long term.
Remember if long-term investment is very risky and very sad if you fail because you have been waiting for it too long so it is better to invest in coins that have proven good, for example Bitcoin.