Do you mean you will hold your BTC for six months? If yes, then stored it on a
non-custodial wallet instead then just idle it there as long as you want and just wake them up once you are now ready to sell it. Transfer it to the exchange of your choice then do the conversion there.
No need to split funds into several exchanges. Just choose the reputable one once you are now decided to sell all your
BTC. Read TOS too as there will be lots of changes after 6 months later.
i want to sell btc today and re enter later after 6 months. where should i keep the money.
You can sell your BTC pair USDT, USDC, USD in any exchange you want or custodial wallet. But as we know that saving in the exchanges will not be 100% safe, we need to think of other places to keep our funds safe. Maybe you can consider buying Ledger or Trezor wallet and moving your funds to one of those wallets or you can use both Ledger and Trezor simultaneously. You can keep your BTC in that wallet or sell it using the feature on that wallet so you can get USDT, USD or USDC save on that wallet.
I can suggest you sell some portion of the BTC you have and leave the other part in BTC and wait for the next 6 months so you can sell it directly when the price reach more than $100,000 or in your target price.