Well i see the economy of bitcoin very bright and very great 10years from now, and i am confident that 10 years from now a lot of people all over the world will join the economy of bitcoin and will invest in bitcoin..
Bitcoin would not be an investment in my opinion though 10 years from now as it will become a currency and there would be another good investment vehicle and bitcoin would not be one of them. There will be more people who would adopt the usage of cryptocurrency especially the merchants so they can account their goods and services properly with coins so there would be no need to convert it to fiat so price would be stable. Many of the coins that are created nowadays may be worthless but those who have continuous development will still exist and will be use for their actual use and not just for speculation purposes which is mostly what is happening now.
Ten years from now bitcoin is still standing and still be in number one spot among cryptocurrencies,even their might be a new one pop up. It might be globally recognized and used by that time. This is what I really hope for as a bitcoin investor.
I hope too that bitcoin would still be holding its position as the number one cryptocurrency but if it happened that another coin will claim its crown then you simply have to invest in that another coin however for now, bitcoin is strongly holding the position so we should just accumulate as much bitcoin as we can. Those who are still skeptic about cryptocurrency will be adopters ten years or even five years from now.