On Bebop, you don’t need any ETH to trade a token. The quote you receive for your trade will contain both the price for the transaction and the amount of gas that the liquidity provider (or “LP”) will charge you. Because Bebop holds the wallet that is completing the transaction, you don’t need to have the ETH to support the gas cost. Instead, this fee will be transparently shown to you and deducted from your initial trade — alleviating both the need for ETH and the uncertainty of what the gas will cost.