After a long time of thinking, reading and also investing a bit into Bitcoin I have to say that it looks for me that the main use is actually just pure Investment.
Yes, I agree. It is 'digital gold', not a replacement for cash and cards. The current bitcoin technology is unsuitable for use as a payment system. The transactions are very slow and expensive, and the performance is severely limited by the protocol. Unless a higher-level solution is introduced, it will be more and more of an investment instrument.
What you say with Bitcoin technology is not good, it is a wrong statement. Bitcoin is a new innovation in making the financial system better, faster and easier. Maybe you should think that in the future we will face a lot of changes and one of them is how we do a financial transaction. Bitcoin is a breakthrough that offers many advantages to everyone. Bitcoin is not just an investment, Bitcoin is much bigger than it is. Bitcoin is money, Bitcoin is an asset, Bitcoin is an amazing thing and Bitcoin can realize impossible things to be true. Lots of changes made by Bitcoin, we will all be facing such a sophisticated era and online transactions will be a choice of many people, Bitcoin gives us the ease to perform various financial transactions in the future !!!
Bitcoin probably is money and an asset, as gold is. My point is that at present it is unsuitable for day-to-day payments. Bitcoin is much easier, cheaper and faster to obtain and transfer than gold bullion, but much less convenient, slower and more expensive than credit cards. Paying for a cup of coffee with bitcoin currently seems to me as ridiculous as paying with gold grains.