It's kind like Assets:LiquidCash = Account:Cash + ..., it's balance is sum of all balance, and it's transaction is all transactions on each actually account

Shouldn't be hard to write a plugin that replaces all these accounts by that single one when enabled. Or would you only want that for a specific kind of report?

I don't want to replace the accounts, it's like a "view" on sql, the account is visible but not actually exists.

Then I don't really understand how that is supposed to work - that sounds like it totally violates double entry accounting by having the same balance be present in two accounts.

emmm, you can consider when you select "Assets:" account prefix in fava, which is very similar to what I'm talking about. It's also a view of all account of assets, you can see the history sum in graph and transactions of all sub real accounts, and it won't violate double entry accounting, it doesn't affect real account.

What I want is, I wan use some config to select some accounts of assets , not all assets