Dow is at all time highs.
That's precisely when you want to get out, i.e. sell. You don't want to sell at the rock bottom, do you?
Another recession is overdue, and it's coming within the next 4 years. It's the nature of the economic cycle. There is nothing Trump (or for that matter, Clinton) can do about it. We wouldn't be a capitalist society if the president has any real control over the economy.