Isnt it better to invest all your money in few best coins that to do so with so many coins with low prospect of growth? Bitcoin and ETH gives you great outputs in the market these days. Many other Altcoins are also good for speculation. DO not fear the high cost of investment. You can have ETH at around $174 right now and trust me it is going to rise in days to come.
It depends on what you want to achieve with your investments, if you want profits with a very small amount of risk then investing in bitcoin, ethereum and other good coins will surely give you the profits you are looking for, the problem is that those coins are not going to grow as much as they did in the past and as such your profits will be smaller, but if what you are after are absolute profits then you need to invest in coins that are not very well known, the risks are higher but the profits can be higher as well.