if you have no plans to convert it to usd anytime soon.. then learn trading well and use 1-2 btc and trade in 3-5 exchanges with 10-20 coins

remaining 10 bitcoins you can use 2 btc to buy litecoin as its considered silver standard after bitcoin in the crypto field and you can keep 3 bitcoin idle as you might need some emergency needs sometime and remaining invest in some place or offline projects if at all any or hold it for bitcoin to reach 100,000$

all what i said is my opinion and not an investment advise.