The people selling the picks and shovels, running the exchange sites, yeah, they're making bank.
The problem with the other coins, is that they are all vaporware.
Will Doge coin ever catch on like BTC? **** no.
Litecoin? Can't mine it with BTC hardware(ASIC's and FPGA's), this is why AMD is making bank on the Radeon graphics cards(especially the latest R9 290/280's.
Fedoracoin(yes, that's a thing now), Quark, Stablecoin(this was a... scam?), **** it:
http://altcoins.com/If any of these coins, especially BTC stabilize, then they have a use(a Paypal free of restrictions, a decent online currency, likely low transactions costs[here's .0001 BTC to validate this transaction]). But right now all that's happening is a lot of speculation, a lot of people getting sucked into it(and not to use it -as- a currency, but as speculation for speculation's sake).
And on top of that, there's the wallet issue. Downloading the entire ledger/history of bitcoin transactions, though I understand it may be impossible to not have that, is a ridiculous burden on every system.
Like I said, I actually thought about ****ing around with it for a little while, but A: my cost to hash would be exceedingly expensive, and B: **** it, this is way too complicated to actually become a mainstream thing.