Biden or Trump
Its not like: To be or not to be!
The actual president is the last, and the less, from a generation of classic American politics, that had a growing economy, Petrodollars, and many geopolitical influence around the world. So, Mr Biden is not the present or the future. About his age etc, he was already known to not be so sharp 40 years ago. 
Mr. Trump is just a YouTuber, Tik-Toker, a Superstar telling what most people will like to hear. He will look like any influencer for his own personal grow, nothing new. He’s not young either but, he can promote a new calendar or phisicosomatic rule to calculate the age so he can perfectly confirm his age as 35 years old. 
Both are a big lose of time and opportunities for the US citizens. G_d bless America!