It is a long, long time for me. When we even talk of long term investment, i do not have a strategy that means a time would come when i sell all of my bitcoins. Just as i do not have plans to sell all the properties i own, that is the same way i don't have plans to sell all of my bitcoins. I sell my coins occasionally, , i decide when to take profit here and there, but i am never liquidating everything.

Long term investment is somewhat subjective, Satoshi has been hodling from the beginning, but some other person considers for years to be very long to hodl their bitcoins.