Judging from the price movement I would say that it is quite good, I will give it about 50% to 60% safe?

But, it is not everyone that will be able to have that level of patience, there are people that gave up along the line and especially now that Bitcoin price is high some people wouldnt like to be taking that risk.
Everything has been going fine since the last decade, but what about the next? Do you even know if its still going to be the same? If you can invest and have that level of patience of waiting for a really long time, then its good and if youre lucky there might be a bull run within a short after you have invested and the price would go up.