I think bro, you are the luckiest people in this crypto industry because you owned 12BTC which is considered a very big amount of money when properly manage. I would suggest that keeps on investing cryptos with great potential to grow and you will become a billionare investor in the near future.
That is considered a big amount of money already, owning amounted to 12btc is so amazing, I suggest that you secure your childrens studies, by buying a educational plan, and your life insurance, incase you get older, you are secured with your future, and if there is little that you want to put in investments or business then its up to you already.