[Updated 11.2023]

The cheapest way to transfer a coin/token to your MetaMask Ethereum network depends on various factors, such as the token you want to transfer, network congestion, and the fees set by the network at a given time. 

However, here are a few tips to help minimize costs:

1. Gas fees: 

Gas fees are required to process transactions on the Ethereum network. To reduce costs, you can try setting the gas price lower than the suggested price. However, setting it too low may result in slow transaction confirmation or even failure.

2. Gas limit: 

Adjusting the gas limit appropriately can save costs. A higher limit ensures the transaction is completed, but an excessively high limit can waste gas. Set a limit based on the token transfer or contract interaction you're performing.