I lusted after commems as a youth, bought the moderns when I was mature, and started collecting the classics (1893-1954) when I got old.......they'll never be an investment but pure enjoyment for me. My heirs stand to make some money from what I have amassed, but I fear the bottom line is not real close to what I paid........Heck, they'll never know the difference.
Well, you really don't have to worry, because it's an actual fact. Might you get lucky on a coin or 2 over many years?...sure, but the hits you'll take on the other majority of coins will obliterate those profits. Coin collecting is an enjoyment for the current owner & some kind of "reward" (profit?) for heirs. As has already been suggested, "investing" is better suited for other areas. But don't discount the "cool" factor of owning coins!
If your only objective is to make money, you will probably be disappointed. Buying this sort of stuff from the mint as it's made is more like speculation than investment. If you want to invest in metals, there are far more efficient ways of doing it. If, on the other hand, you enjoy this as a hobby, then you are getting something more than simply investment return on it. Nevertheless, you do owe it to yourself to do some due diligence with regard to the things you are buying and alternatives that exist to direct mint sales that you may enjoy more and may be a better deal.
Keep track of the time you put into the hobby. Report the time on your taxes. At $75.00 an hour you'd be taking a loss.