You can invest some but don't assume that it will most probably increase its price to that amount.
But I am seeing that the price of ethereum is increasing so anyone who will want to invest in that coin will not lose their income and will earn a high profit even from that currency along with bitcoin but I have my money in bitcoin because I am seeing that the price of bitcoin is much faster than ethereum. If someone will want to choose one of them then the better option for them is bitcoin.
So yoi are really into buying biycoin more than of altcoin. Theres nothing wrong with that, actually it better. But buying altcoin like ethereum also makes you have more bitcoin. If you will just buy low sell high.