Bertrand, a Champions League winner with the Stamford Bridge club the season before last, will thrive at Villa alongside like-minded ambitious young players, according to wise veteran Holt.
"The thing with Ryan is he's won the highest honour you can get," Holt told the Birmingham Mail.
"He's won the Champions League and played for Chelsea and you don't get to do those things if you're not a very talented player.
"I think everyone knows that he is. In his time at Chelsea, he hasn't had the run of games that he wants and he's had some good loan moves.
"I think this will be a fabulous move for him. He's come into a bunch of young lads who are looking for the same thing as he is and his performances have been excellent."
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