I'm betting for Trump to continue his presidency.
To be fair, I once a Bernie supporter, he seems to care about his people truly. But, then I realized he is too communist.
You are correct about Bernie and to be fair, Trump does not have a real competitor in the race. Trump's party supports him and for the opposite party, there is no real competitive competitor. Trump will win this election, much easier than his previous campaign, then having his second presidency.
It doesn't matter if you are a Bernie supporter or not, it doesn't matter if you would vote for him or you see his stuff online everywhere or anything like that, it doesn't even matter about polling in the end because polling means somebody called someone and asked.
When it comes to young voter turnout, even Bernie who managed to create this insane social media presence failed on super Tuesday, people who were under 40 years old didn't go out to vote all that much, waiting in line for 5+ hours was too much of a "task" to them and many of them didn't even know the dates. So as you can see whoever attracts more 65+ year olds will get the nomination and that is Biden.
I would love it if Bernie was the president, that would be awesome but he won't be all due to laziness of the young voters on super Tuesday. From here on out there are not many states Bernie can win, it looks like he is done and Biden will win, Bernie had to make a splash in super Tuesday and get some Biden states but instead Biden got some Bernie states which was the nail in the coffin for Bernie's campaign. Biden versus Trump will be really easy for Trump as well, he will destroy Biden and will get reelected.