Bale, though, appears to have the edge over Karim Benzema to partner the Ballon d'Or victor after a late-season burst of eight goals in eight La Liga games moved him from the fringes of Zinedine Zidane's thinking to a central role in the his plans.
The Welshman scored the 2014 Champions League victor for the Los Blancos but started from the bench in the 2017 final at Cardiff.
Giggs feels Bale is capable of making an impact in the tie: "Every time he is involved, he makes a difference".
He became the first player ever to score in all six matches in a Champions League group stage in December and with further strikes against Paris St Germain and Juventus in the knockout rounds he set yet another record in the competition by scoring in 10 consecutive games in the same season. "But if he doesn't, then he's ready to score that victor anyway".
While Bale and Benzema may be selected to fill support roles against Liverpool, Madrid will once again be looking to five-time Ballon d'Or victor Ronaldo for inspiration.
And despite having his critics in Spain, Bale has still managed to score 19 goals this season in an injury-hit campaign. "He's been a match-winner and he's had a great season", Giggs said. "He's been playing at a top club for a long time where brilliant players have notoriously not lasted very long".
However, Wales boss Giggs believes his player has the ability to dictate Saturday's result whether he starts or not.
"It is hard to split them", Giggs added. "They are our main rivals for a reason - they've got great history, they're a brilliant club and it's hard for a United fan to take". "But a lot of Liverpool's success this year in the Champions League has come from being at home, at Anfield. But in those situations you just have to look after yourselves and try and win things".