If you want to be happy dont use your bitcoin for you to buy drugs because its illegal and government will surely run after you, instead use your profit with bitcoin to support for your goals in life, use it for what ever legal purposes you want to do. Make your future healthy and not but any drugs.
It's not about happy or unhappy, but for drugs dealer or drugs transaction, bitcoin is really good for them. They can make the transaction using bitcoin and police never know about that, especially if the police don't know about bitcoin too. I think buying drugs with bitcoin is very possible but yeah it's still risky.