The process of this funds check is to find out if you are going to be a burden on the state's welfare system during your trip.
So, what they are looking for in reality is:
You have steady income (this also validates any job letters)
You have expenses proving you are living here. For example, most rents are due at intervals, and showing these withdraws or similar shows you are legitimately staying here; and in some jurisdictions they may even ask for tax statements.
It shows proof that after your expenses for the trip you have sufficient funds to support yourself. Now these funds don't have to be all in your bank account, the can be funds that are given to you specifically for the trip - and if so, they should be properly documented.
A large influx of cash in an account (even if you were to "wait" long enough - most applications require 3 months statements) will raise a lot of red flags; especially if you are unable to justify the nature and purpose of the funds.
Do not do it. It may (at best) cause your application to be rejected and at worst get you banned for actively trying to defraud the process.