Still, the success of DeFi and Ethereum threatens to price out investors with lower capital funds. Since every action on Ethereum costs gas (paid in ETH) to execute, and the amount of gas that can be spent in a block is limited, a bidding war ensues among participants. During times of high activity, this gas cost can skyrocket, and as the USD of ETH rises, these operations will become more and more costly. Anyone with experience in DeFi the last six month can attest to the difference between a transaction that costs 40 gwei with ETH at $300 USD, versus the same transaction at 150 gwei with ETH at $1400. Participation in farming pools might require half a dozen or more approvals as funds are swapped, contract spends are approved, and LP is staked. $60 or $300 to move in and out of a position is not unusual with some pools. Performing such actions within a TokenSet allows the Set Controller to pay the gas costs directly, instead of requiring entrants to pay to implement the strategy for the entire pool, as is the case with Yearn Vaults, for example.