jzcjca00,
Is selling my current bitcoins necessary in order to purchase bitcoins into new LLC Roth IRA?
It seems that selling bitcoins that I held for a while leaves me with fiat that I cannot put into the first Roth IRA
due to contribution limits.
Can I just open LLC Roth with fiat from the sale of mutual funds (from your example)?
No, there is no requirement that you sell your existing bitcoins when you buy them in your retirement account.
I have about 10% of my net worth in bitcoins, and my goal is to keep it about the same. Once my IRA LLC is funded, my goal will be to buy coins into the IRA LLC and sell the same number of coins from my personal stash at approximately the same time, hopefully not losing much in the exchange.
I believe that bitcoins are risky, so I don't want to put too many eggs into this one basket. If it lives up to its potential, you don't need to own huge numbers of bitcoins to be set for life.