select date_trunc ('month', balance_date) as mes,
symbol,
avg(balance) as avg_balance,
avg(amount_usd) as avg_balanceUSD
from ethereum.erc20_balances
where balance_date >= '2021-07-01'
and user_address = lower ('0x2Fb9F0ef424b24a8D293999298F392a33Fe6A8b5')
group by 1, 2