Selling S&P buying BTC

This weekend i'm exploring selling some of my stocks/shares mostly invested in the S&P to buy BTC. main motivation is institutional buying, stock to flow model, general potential over other traditional assets. I already have a crypto portfolio but this will be the first time selling shares to buy BTC. my current portfolio is 70/30 and this change will take me 60/40 (stock/crypto) feels like a now or never moment!