Biden deserves to be investigated, no question. There's absolutely something there that does deserve to be checked up on and brought to the light of day.
However, coming from the Trump camp, it is hilariously overshadowed by their own improprieties which are even more deserving of investigation.
The head scratching in here isn't that Biden's innocent, it's more the hypocrisy of Trump querying about nepotism and corruption with foreign governments when he's used his Presidency to feather his own nest like no other politician in US history.