If you can hold those fund for long term then I think the best option will be Bitcoin for investing. As you already say that the fund is yours so just give sometimes on basic analysis then accumulate the fund on Bitcoin. Don't go for the alternative coin there is highly risk but in case of bitcoin if you hold for long-term then the risk will be more lower. At here you don't have to be worried about the fund security. I will also say that make a dca strategy and then start investing on Bitcoin for long term even you have those fund.