First of all I'm a small bitcoin investor, and I'm not too old to invest so this is the beginning of my investment.
You should not be worried about the small bitcoin investment you made in bitcoin today because, as time goes on, it will grow to be a huge return for you. All you need to do is be patient enough and have a long-term investing plan.
If you are familiar with the history of bitcoin price and its early adopters, you would have been probably aware that the majority of its Investors invested small amount of their own money in bitcoin, and those who hodl it for a long time benefited from the long-term gains that bitcoin generates for its holders.
As at the time this post was written, you don't need money, so hold onto your bitcoin tightly. In case of any time you need money, just sell some part of your bitcoin investment and hodl the rest. Never forget that bitcoin investments haven't stopped anyone from buying when they have spare money to invest.