Would suggest you to wait. There's a hardfork that will happen in this month and even if it is exoected that its market value will be more expensive, still, there's no assurance that it will happen. Also, its market value is still expensive. It will be a 2ise choice if you 2ill wait for its value to fall or tobl be lo2 even if it will take a period of time for it to happen because its value is cintinuously increasing.
It is good if you wait for a time when the price goes down and when sell it out when the price goes up so keeping yourself attentive on the market situation as it need several hours to set in front of your computer so invest your money in bitcoin for better gaining a regular and extra profit.
Let's say bitcoin would still be around for another 20 years, the way bitcoin works is it rewards early adopters more as it is a deflationary currency so one should expect that prices would only be going up(unless some major event unfolds). Say for example, you have invested now at this price, surely you have obtain a nice amount of profit by then.
No one can say about the future and it is looking very difficult to predict for 20 years of the life of bitcoin although it is very hopeful to say that bitcoin will alive for a long time because it is growing very fast and with continuity as well as it is popularizing among the countries of the whole world.