If I were you, I will not do that. Do not exchange your stock assets for cryptocurrencies because it is a high risk investment because of the volatility and it could give you a lot of losses if you do not know how to invest with the help of technical analysis. I would suggest for you to just get at least 10-30% of your stock portfolio and put it into cryptocurrency so you will have a good ratio of diversification.
Well, there's a lot more room for profit with cryptocurrency because of that volatility. And add that to the increasing popularity of the crypto scene over the world, Most would be tempted to actually go ahead and invest on them. Besides, even if you know how to TA, it's only one part of earning profit. The basics should be solid already since he came from the stock market, and so the only thing he pretty much needs is to understand the futures of each coin he chose.
I'd personally recommend adding Litecoin and Ripple to your choice of investment. Much more diversified portfolio imo. BTC and ETH is already a standard, so no opinion on that. s