So In conclusion, I respectfully ask "what is your Effective Expert Advise for a Person (me) that has enough Salary but still want more Financial Stability using cryptocurrency".
Why not learn to trade, make bitcoin investment and hold, there's great advantage in doing this, but not until then, you need to begin from somewhere, atleast start with something, learn about bitcoin and develope a better strategy you needed to use in achieving your financial success with it, invest and hold, you can also use the DCA pattern for your accumulation, there are many other opportunities you can explore once you started with bitcoin.
Op has said that he has studied all the trades but doesn't know if it's just the truth or if he doesn't want to risk losing more, he said he hasn't found an expert, I think the so-called experts are probably those who have been in trading for a long time with years, as for the skills of all the industries mentioned, maybe it's the real world.
Investing in Bitcoin and then holding it is a good practice but it must be balanced with the cash flow he has, if he only relies on investment to achieve financial stability while he himself does not have enough funds in any case then it will be difficult, then the most important thing is how cash flow becomes stable and can set aside bitcoin accumulation it will be better, actually about financial stability depending on him doing good management in his finances.