One of the most popular progressive jackpots slots is undoubtedly Wall Street Fever and why not? (Besides the general distastefulness of anything high finance-related these days, I mean.) Five-reel, 5-payline Wall Street Fever pretty much has everything you want in a progressive slot: Nice effects, enough winning combinations, a bonus round, and the potential for up to 50 free spins – making this online slot a better bet than the stock market right now.