If you have a lot of crypto, keep it safe by getting a Ledger Nano X or a Trezor Model T hardware wallet:
Staking/Delegating to a stake pool does NOT involve transfer of ADA.
ADA stays safely in your own, preferably hardware, wallet!
For more info about Staking on Cardano, see the official staking page.
Stay Vigilant Out There And Never Share Your Private Keys.