You invested $5 in bitcoin? That amount is small.
Previously, it was impossible to buy with $5 because it is smaller than the minimum amount for an order on Binance. Fortunately, Binance updated their service terms and reduced the minimum order size from $10 to $5.
Announcement for the order size change.
$5 is big money for many people so it's good to see a solid plan for accumulation with only $5 for each buying time.
But if you want to DCA, you can continue investing like that every week. Bitcoin will get to $100000 before the next significant bull run ended. Try as much as possible to accumulate.
https://dcabtc.com/https://costavg.com/Two websites with excellent and helpful tools to support your Dollar Cost Averaging plan.
With the small amount $5 for each DCA, OP will have to think of how long he will have to leave his bitcoin on Binance till a time it makes sense to withdraw it to his non custodial wallet. Because withdrawal fee is expensive and if the withdrawal value is too small, it is not wisely to do it. Withdrawal fee for Bitcoin on Binance is below.
https://www.binance.com/en/fee/cryptoFee