I suggest that better put your money into bitcoin, because for me it is more profitable than to other coin that sudden dump after someone invested high amount of money.
It is said that never put all you eggs in the same basket. In the same way if the amount is big never invest in one thing only. Split it according to your requirement like short term and long term plan and then place in different asset class to distribute your risk accordingly. For example you can put some money if different alt coins and other in bitcoin.
You can invest some in PRE ICO stage coins if you think that coin has a future so that if it works returns will be manifold times.