I believe you are completely wrong to think that you can invest in long-term bitcoin. You can see that the price of bitcoin in recent days is fluctuating continuously and extremely complex, currently bitcoin prices are constantly plunging and falling, the BTC is touching $ 6600 level and there are no signs of recovery.  So you invest in bitcoin the present moment is completely wrong, you will lose very heavy if the longer hold. The market is going down and I believe you should not hold at the moment.