I'm not the wagering type of person, but I think that "wagering 4k BTC" doesn't equal to "owning 4k BTC to gamble with".
I think you can own 1 BTC and wager it 4k times - let's assume here you don't win nor lose - and it would correspond to having wagered 4k BTC.
Wagering 4k times is a very difficult job but I think wagering 400 times is still achievable.
Even I am not a person who can wager more than 50 times. I more of a 'all in' type of person.
I gamble with what I have and lose and then wait for another deposit

I hugely doubt there will exist any promotion that will ask you to wager up to 4K Bitcoin, I even seriously doubt that about 400, especially when the price has risen so significantly.
If you want a free Wheel of Fortune bonus in proportion of your deposit amount, you just need to convert your BTC amount in FUN tokens and to deposit them on Freebitcoin. With only 5000 FUN you'll get immediately 3 WOF free rolls each day, with 50 000 you'll get 7 rolls, and with 500 000, 13 rolls...
there is a huge difference between depositing bitcoin in this site and having it sit there safely and even generate some profit and converting the precious bitcoin to a token that is volatile in nature and has a chance of going down in price so my bitcoins could be partially lost.
Good mark but at the same time these kind of promotions are created in order to increase the price of FUN token. Also, freebitco has purchased the most coins, so, it's in their best interest to increase the price of FUN. I believe the FUN will rise but at the same time, such tokens are created for gamblers, not for investors. After all, it's fun token and Wheel of Fortune is pretty fun to try.