In cryptocurrency, we have no limit to the extent of how we can hodl, all that is needed is our affordability of the pattern desiring to hold the coin in mind, then also, if we must hodl, it must not be on compulsive decision, we have to do it at every convenience that such could not affect us, we must also not borrow funds to invest and hold, all these are what determines how long we could manage to hold our investment in bitcoin.