Now it is best to invest in the best coins. And they are currently Bitcoin and Ethereum. Invest in these coins and you will not go wrong.
Other active projects can also be profitable, but they are less reliable.
Choosing the best projects is always a risk-free way of maximizing our profits. But, I do not know why people are looking for new projects and then losing their capital. Some new projects are good for quick and maximum returns but we need to consider the risk involved with those new project so that we must avoid them.
I'm always looking to invest only into bitcoin and few other major coins. This way I am eliminating most of the risks involved in usual crypto investments.