Simple information
1. Nobody knows so if you ask you will get 1000000 advices. And remember it's not their money so they can easily give you shit advice.
2. If you have the money then why not give it a try. If you don't invest you will never win (or lose).
3. You might want to consider waiting for the next bear market and try buying lower or just ride out the 10 years hoping this was low compared to the $100k in 2027 ;-P.
4. Waiting 10 years is a good plan and I believe it will either be at least 1000% higher or extinct. But I would read up on Bitcoin and make an educated guess on when to get out.
5. You could do a phased buy. Buy 0.1 BTC every week or month. This will give you an average buy rate.
6. Look at the history charts and try and see patterns.
7. Greed kills so don't make any rush judgements.
8. If you still want to do the 10 year plan then stick to it and don't get scared even if it goes down the shitter for a while.
Anyway. Read up and make your own plan and stick to it.
I think that bitcoin will be >1000% higher in 10 years.
I have been in Bitcoin since 2013 and my plan has been to hold until 2020.
My reasoning has been that the game will change when mining is no longer profitable and only few coins are to be mined.
I have tried trading with 1 BTC and lost most of it, but learnt a lot about trading.
Now I view my BTC holdings as a lottery ticket which has a high potential of winning the lottery
So in essence I am running the same plan as you are and I believe a lot of people are doing that too.
In the beginning I was a bit scared seeing it all plummet but nowadays I don't care. I forget about Bitcoin regularly and don't obsess on it anymore.