Both type of project can used for taking profit. If you are talking about trending altcoins, then no problem to purchase them! But as you know, the is a chance that trending project will dump when the trend is end. So before that you should have to sold your share, with good price. That's all. But when it's come to long term projects then you must need to purchase those kind of project what have potentiality for long teme period. Don't go with project that is offering you lots of benefits but you should select that altcoins what might be slow growing but safe and secure like ether or bnb. In my opinion
I think it can depend on the person and their investment goals. We all invest in different amounts and in different platforms as well as different timeframes. I suggest that we diversify our portfolio in such a way where you could invest in a much safer altcoin and then find for others which are a little risky but can give you lots of profit.