How to Buy renBTC (RENBTC) with Sponge (OLD) ($SPONGE)

To buy renBTC using Sponge (OLD), first, find a cryptocurrency exchange that supports the RENBTC/$SPONGE trading pair. Create an account, verify your identity, and deposit your $SPONGE into your exchange wallet. Locate the RENBTC/$SPONGE pair on the trading platform and place an order to exchange your Sponge (OLD) for renBTC. If the RENBTC/$SPONGE pair is unavailable, you can first exchange Sponge (OLD) for a stablecoin like Tether (USDT) or a fiat currency, then trade that for renBTC. Be mindful of potential exchange fees, which vary by platform and can affect the total cost of your transaction.