A total horseshit about 15% long term cap gains in US.
The upper limit (currently) is 23.8% for Federal alone. Add more if your state taxes it as well, like Cali & NY. My state does not, which is a plus.
That 23.8% federal is about to move to 43.4%, I don't doubt it.

calculator:
https://smartasset.com/investing/capital-gains-tax-calculator