If I invest $10,000 in ETH and hodl for 1 year...will I be rich? Just curious

You need to be more specific what do you mean by rich? Do you mean 100k or 1 million dollars? Because if you mean an amount of money between those values then the answer is no, ETH is not going to grow that much that fast if you want profits like that then you need to become a trader or you need to invest in an ico and hope for the coin to skyrocket.