You can only win one GoldenVegas Jackpot at a time.
However, it is possible to win several GoldenVegas Jackpots during the same day. Therefore, you could win the Joker Drop, Cash Fever and Time to Spin jackpots all in the same day.
You can also win a GoldenVegas Jackpot at the same time as a specific jackpot in a game. This is because the GoldenVegas Jackpots are completely independent of other jackpots.