The benefits of saving for a long time is the future price increase and when you sell it you will gain profit. That profit you gain will be use for the investments you are planning to have for a long time.
yes saving bitcoin ofr a long time will really be a very very right decision, as the price of bitcoin s already trading at a high price and there are also chances of that the price fell down a little therefoer i think it will be a right decision to hold bitcoin for a long time.
You can compare the price of bitcoins of last year in march 2016 and this year in march. You will see 600 to 700$ price increase. This shows that bitcoins is best to invest and save as you will nearly double your money in every year if it contiunes to grow at this rate.
At least 50% is good to save this is good compare you have mentioned with price increase from last year to this year, also this is indicator that price will go up in next period on if you look at 1 year then it is good to hope that price will go up in next year.
Let's not overreact with the recent price fall, we are still in the early stage of the year and we are closing the first quarter only which means there are 3 more quarters to get a good price. We have seen how the price can rise and it can even happen overnight, let us stay positive for the future of bitcoin and everything shall be fine, never panic is you want to be a successful long term investor, you need to trust the potential of bitcoin.