Anyways, investing depends on our risk appetite. Some people have no worry about investing in new projects as they are not afraid to lose their money as well but those who are looking for safe investment (at least), better not dare to try this because that only will lead to losing, especially when doubts and uncertainty arise.
with risk management only small portion of investment allocated for these new coins but it could necessarily be one of the largest contributor towards the investment portfolio considering sometime the growth of new project altcoin are so massive that it dwarf the investment return rate of other investment like bitcoin and ethereum.
but of course its 1 out of 5 that the project just gonna outright fail and then value plummet. but with small capital, it can grow really high or it can just vanish, and even if worst scenario happened, no need to worry.