OP first says NOT going to be dramatically altering his lifestyle and then goes ahead and sells his car, stops going out to have some fun, stops going to the gym, and even plans to not go shopping for about 6 months. If that isn't altering, I don't know what is. So, I believe these statements are greatly contradicting each other:
I'll focus on regular investments without dramatically altering my lifestyle, ensuring a balance between saving and enjoying life in the present.
- No more buying new clothes, shoes, phones, or electronic devices. No more eating out. I'll cook all my meals. The money saved will be used to buy more Bitcoins.
- This month, I'm selling off my car and I'll start using the train for commuting to work or any other essential place. Therefore, unless it is absolutely necessary, my social life is going to suffer for a little while. This delay of gratification is worth it.
- I didn't renew my gym membership. I purchased some dumbbells and barbells to start working out from home. The money supposed to be spent on the gym membership will be used to buy more Bitcoins.
I wouldn't call them regular investments if you are doing all these things to be able to make those investments. A regular investment would be the money that you can save from your income, or just renting a part of the apartment should have been enough for you to buy Bitcoin during this time, but doing all other things makes it a bit excessive, in my opinion.
For me, I'm not going to change my lifestyle or do things that will make me stop enjoying my life only so that I can buy more Bitcoins. I will buy when I know I have extra money left from my income after taking care of all the needs of my personal life.