Well... The whole thing about collecting is to collect what appeals to you. Whether or not these replicas carry any after market premium is doubtful. I have stacks of wheat cents that will never be worth much more than 2-3 cents each. I like them. If replica coinage appeal s to you, go for it!
There are certainly enough people selling the copies/tributes that there has to be a large enough market for them. I even see them advertised with certain years so people can "complete a set" with all years (i.e. Morgan and Peace Dollars). Right now, I am attempting to focus on real silver and gold coins but I might buy one of those nickels if I can get it at a good enough price...LOL