No Red Bull or Williams, but anonymity: Is there a way back into F1?

Without much difficulty, Franco Colapinto can be seen as the man who opened the door for a lot of future rookies in Formula 1. Indeed, it was the Argentine who showed after his unexpected move from F2 into the Williams car that there are indeed talents who can make an impact in a world where conservatism reigned supreme. But while five youngsters will soon be able to start their first year in F1, Colapinto will be sitting at home. Is there any way back to the sport for him?