I think even in future bitcoin will remain affordable. If you think about rising price of bitcoin then the best time to save bitcoin in now or never. But if the trend continues soon bitcoin wont be affordable at all - then people will start selling away all their bitcoin and then prices will drop. People will again buy and prices rise again, so the cycle will continue. So investing in bitcoin at any time seems profitable.
Yeah, I would invest in bitcoin at any time. It will pay off