People who have some extra amount an ready to take an aggressive risk can invest in the new project or much lesser known coins and if think can make it big in come say 3-5 years or so then yes probably can stay invested or once they achieve some profit can also exit. But for people who do now know and cannot take such risk then better to stay invested with the altcoins and when market falls one should be looking this an opportunity to buy rather than exiting the market.
for long-term investment in new coins seems too big a risk to be faced. planning duration for new project investments that have good development for at least 1-3 years. after that, what happened was the weakening of their markets. some new projects do not have strong support when the market is down.
The new coin is always a risk, we should always choose the old coin which has completed their product, old coins will have higher chances to increase their price along with the Bitcoin price. If we are looking for long term investment, we should leave them until we make some decent profit. Choosing wise coins will always help us to learn new fundamental analysis about the coins.
If you are a long-time investor in this market, you definitely have to change this mindset. In my opinion, new coins are a good choice for you to become rich from this market because if you choose to invest only in the top 10 coins, the chance for you to make a profit is very low.
I am only interested in the new coins that people are talking about recently because if you choose a potential project, the opportunity to earn huge profits will be very easy.