So I'm saying his motivation is the common good. You're saying it's for self-interest. Unsure why my beliefs are worth less than yours. But if you think Trump is doing this for his own gain, there are numbers you could verify if you want to support that.
Trump's net worth in 2015 according to
Forbes: $4.5 billion
Trump's net worth in 2019 according to Forbes: $3.1 billion
That's a drop of $1.4 billion during his presidency.
In comparison, Obama's net worth is
30 times higher than the day he went into office.
Than you could look at the national numbers of the US, if the average citizen has gained or lost during Trump's presidency and compare it to Trump's net worth loss of 30%.