When the leaving wave from Grayscale ends, the market will calm down. Don't let this short term movement affects your own long term investment plan.
Hopefully what they're doing is going to allow me to invest into bitcoin at a lower price and get some profit, I wouldn't say that I agree or disagree totally with the advice to not let this influence how you invest for the long-term when this can be a useful knowledge in terms of buying bitcoin or shorting bitcoin to gain a profit, it will affect my plan but in a positive way.