By reducing the positions held in stocks and bonds:
Starting with a 60-40 equity-bond portfolio, which is produced with a risk aversion of 𝛾 = 1.50, the optimal BTC allocation is a large 84.9%! The remainder of the portfolio, 15.1% is split 60-40 between equities and bonds.
that linked article had many exampled positions with many different allocation amounts.. picking just the highest mentioned is not what blackrock concludes.. their actual conclusion is a 3% position of btc allocation not 84.9%
also reading through other commercial banks desires to hoard bitcoin via the BIS settlement network agreements. they too want more hen 2% but less than 5% ability to hoard BTC