We don't have to buy if for the future, if you have a bitcoin, better to grow it instead of continuing to buy. growing will be better. don't worry, because the price of the bitcoin still long to rise to a high price so you have plenty of time to grow and continue to collect for the future.
Yeah its good to grow them but if no one will prefer to buy then price will not go higher in future, as we need people should invest their fresh money in it to take its price higher.
If the bitcoin is developed properly in the next few decades, more people will invest in the bitcoin, the price will be higher.