Example 1 : What would happen, if I re-invested that yield, compared to withdrawing it and just using it for something else.
I didnt get it.
If you reinvest what you just withdrawal at the same time, it is the same as never withdrawal.
You would have a flat line with your btc stash, instead of a decreasing btc stash. If you had 0.5btc, and never sell, you will have 0.5btc forever

JJG has another strategy to sell and buy again using 200WMA, which will be a next tool.
Example 2 : What would have happened, if I simply deposited it into a fixed deposit at a Bank. (Fixed interest rate, with an option to make additional deposits)
Now you will have an some exponential growth due to compound interest. There are many tools for compound interest in the web. But time is the most important variable here. You need long time.
https://www.fidelity.com/learning-center/trading-investing/compound-interest