Holding bitcoin to or 4 to 10yrs doesn't necessarily mean that our investment is going to be successful or in profit. If we look at bitcoin past record it shows that long term holders have been more successful than short term holder , however since the future is unpredictable. There are so many things or factors that may affect the performance of bitcoin. Holding bitcoin for long term may reduce the impact of short term volatility, however it doesn't mean that it has removed the chances of loss. There is still risk in long term investment, so holding for longer time isn't a guarantee that our investment is going to be successful