Bale, who claimed the Football Writers' Association's Footballer of the Year award at the end of last season, netted 26 times for Andre Villas-Boas' side and has become one of the most sought-after players in world football.
The 24-year old has been linked with a move to Spanish giants Real Madrid throughout the transfer window, but Sigurdsson believes that Bale will remain at White Hart Lane.
"He's a great player and if he stays it will be fantastic. I am sure he will stay because he's still here," he told reporters.
"He is a draw for other players to come here. Good players want to play with other big players. It's a big club and hopefully he'll stay and we'll bring in a few other good players."
Sigurdsson is also of the opinion that Bale's presence can help Spurs to push on and claim a Champions League spot this time around.
"The players here talk about getting into the Champions League two seasons ago and how fantastic it was," he said.
"Missing out when Chelsea won the Champions League and being fifth last season was very disappointing.
"It's hard to deal with for a couple of weeks after the season ends but then you start thinking about the next season. We're determined to make it our year."
Villas-Boas has boosted his options with the signings of Brazilian midfielder Paulinho from Corinthians and Dutch winger Nacer Chadli from FC Twente this summer, and Sigurdsson thinks that Spurs' squad has improved.
"We've strengthened. We saw Paulinho in the Confederations Cup. He looked a good player there and was shining," said the Iceland international.
"We've signed a winger from Holland as well who is looking really good in training. Hopefully we'll bring a couple more in and they'll help us for the season.
"The team spirit is really good and a lot of the players are the same age, so we all get along really well.
"We're all determined to get that Champions League spot and win some trophies, that's the important thing."