If you are still young, it is good that you extend your bitcoin investment timeline to 10 years and above because that is what really seems to be a long-term duration. You should know that the more you are increasing and hodli your bitcoin investment for a longer time, the more you have a bigger chance of increasing your bitcoin investment and enjoy the compounding effect of your portfolio overtime. You will easily get to your bitcoin target and have a good size of bitcoin in future.
A young man's bitcoin is more convenient and easier for him to hold in the long run. As soon as a person is 25 years of age or somewhat less or more. In this case, if he holds it for 3 or 4 cycles, then he can invest his money in a real estate business or any other business with that investment and create a source of income for life management. Or he can use this money to improve his quality of life more. I think around 40 years of age or less would be the right time for a person to get established. Every action has a reaction, if you can make the investment at this young age by making sacrifices and prolonging it then you can expect something good in return later or something good is expected of you. If you have been thinking of luxury since now, it is difficult to expect anything good in response in later life.
When it comes to investment age is just a number. Anyone could possibly start to invest in Bitcoin as early as they want if they are able to afford investing in it. For me i can easily say the younger the better. Many people have different or similar knowledge and understanding about how Bitcoin works and at a tender age it will be more of an advantage because before they grow up completely they must have have an in depth knowledge of Bitcoin. If it was not possible for them to start investing in Bitcoin then, it will be a lot easier for them to go about it when they start working and have money to buy Bitcoin.
What i can say more is that, no matter the age we are, its best to invest at our pace and financial level then spend time understanding Bitcoin more.