Not always. It depends on how long you held the item before resale (long term or short term capital gain), and also what your ordinary income tax rate is. Long-term capital gains on collectibles are taxed at the LOWER of your ordinary income tax rate or 28%.
Here is some more detailed info copied over from a webpage:
Long-term gains from the sale of collectibles can be hit with a capital gains tax as high as 28%.
If your ordinary tax rate is lower than 28%, then that rate will apply.
But if you're in a higher tax bracket (i.e., 32%, 35% or 37%),
then the capital gains tax on your collectible gains is capped at 28%.
The 28% limit doesn't apply to short-term capital gains.
So, if you don't own a collectible for at least one year before selling it,
you'll still be taxed on any gain at your ordinary tax rate (between 10% and 37%).