Before talking about the characteristics of bitcoin with others, my friend raised doubts that when trading on the trading platform, we should save the bitcoin to the address specified by the platform, that is to say, we handed the bitcoin to the trading platform in exchange for " At any time to the platform to mention the credit "commitment. But there have been several incidents in which platforms were stolen and bitcoin stolen, investors suffered. Moreover, due to the characteristics of bitcoin, the stolen currency has no traceability, that is to say it does not even know whether it is a trading platform to defend itself from theft. Is it ironic that a so-called decentralized currency relies heavily on the credit of the trading platform? This makes me feel embarrassed, I do not know how to accurately refute him, I hope you can express your opinion.
You can reduce the chances of getting embarrassed by:
1) Using only reputed exchanges that are more trusted and established.
2) Saving your Bitcoins on different exchanges or even better in a physical wallet (this become more important if you are investing huge amount of money).
There will always be merits and demerits of any system and you have to make the decision of using that system after evaluating them.
Thank you, your advice is very helpful to me. It is impossible for each system to be perfect and everything has two sides. I think my friend is too harsh on bitcoin, and this is why I can not convince him to invest bitcoin the reason, he himself did not like bitcoin.