This is not true.

If you hold an asset for more than a year, any capital gains will generally be subject to long-term capital gains taxes, which are generally less than short term (<1 year held) capital gains taxes (generally are taxed similarly to ordinary income).

In general, you can use any capital gains losses to offset capital gains if you sell both in the same year.

I would suggest that you consult with a tax professional who is familiar with your individual tax situation who can give you personalized tax advice, rather than generalized tax information as you will find in this thread.