Hey, you can read @Ratimov's tutorial - [Tutorial] Crypto taxes for beginners

To answer your question, yes you can spend your crypto you've held for over a year and be subjected to long term capital gains tax.

If I am not mistaken, what you sell/move is what's subjected to tax. The balance you held isn't.

To make things simple for you, it would be wise to have a separate wallet for BTC you plan to hold for long term and those you plan on spending short term.