Capital gains as a person or as an LLC

Hi, I trade in the stock markets a lot and generate significant amounts of taxable capital gains most years. That is my main source of income. My question is as follows: should I continue doing what I am doing right now - which is basically doing all the trading in accounts under my name and pay the taxes on the capital gains on my personal income tax return? Or should I create an LLC (or an S corp), open brokerage accounts in the LLC's name, transfer my assets to the LLC, have the LLC accrue all the capital gains and account for it either on Schedule C on my tax return or prepare a separate tax return for my LLC?

Is there any point in having an LLC accrue capital gains rather than me as a person? Would I be able to get some other benefits because of the LLC method (such as being able to contribute some of those gains to a 401(k) as part of my compensation from the LLC or something like that)?

Thank you for any thoughts you may have about how to structure this for the best benefit.