There is a level of trust that have develop over time towards bitcoin. Bitcoin have proven to be an innovative fintech with  incomparable transparency and speed.

I am not sure if I have understood it correctly! "uncertainty" is what made crypto market a speculator's heaven but can you please explain about "vulnerability" please? I know the meaning of "vulnerability" but unable to understand the context here!

The trust factor is very closely related to the potential profit. A majority of the people is still attached with the crypto market, because they believe that cryptos will reach to Moon one day and they will be millionaires. That's how this group of people "Trusts" crypto.

A very small percentage of people are actually interested in technology and that's why they "trust" crypto! But we can't really leave any one of them because both type of believers are the pillars of crypto eco-system! Some trust the money and some trust the technicality! That's it, Simple!

what made this level of trust to develop over time? and do you think transparency and speed are some of the factors that influence trust in Bitcoin?

Things like culture and age will indeed influence, but if we talk about cryptocurrency then I am very sure that this does not have a big influence. Cryptocurrency like Bitcoin is easy to learn so I think everyone can easily understand Bitcoin. What is needed is willingness, when we have a good sense of knowledge we will have the opportunity to achieve good results too.

From my point of view, I think Bitcoin has been trusted for many years now eventhough the first FUD years really existed, and I think this is one of the many reasons why people trust the Bitcoin system. Many critics, analysts, amd crypto experts said that "Bitcoin will fall", "Bitcoin will not last", and many more things that only proved them wrong these last few years of bullish market, and from my point of view, many would say now that the Bitcoin system is trusted proven by many crypto enthusiasts and they're thr ones that are gonna advetise the credibility of it attracting more investors payment systems applications, and future investors.

The ability for bitcoin to rise from the scratch to its current state without been hacked, is enough to gain investors trust. Bitcoin over the years has brought  tremendous growth in the crypto currency world and in the world generally today, i personally think that it deserve all the trust and support from the us...

We have this issue back in few years ago that bitcoin and some other crypto will be just like a bubble, reaching heights but will pop out and vanish, investors trust bitcoin because of it's capability to be the biggest asset an investor could have save in the near future,  factors can be evaluated through exchanges when you trade bitcoin to other crypto. 

I think the main factor of growth played a hard fork and then started to take in Japan ! Now light waiting for the ETF !

Good question!

IMO: if we evaluate BTCs long term survailability, we should focus on it´s scalability issue first. No one has actually proven, BTC is scalable into being a viable currency. For me its mathematically very improbable and thats why Im a huge sceptioc of BTC.

After the main question, many others would follow, but thats the main one for me.

Important side note: BTCs scalability at decentralized blockchain technology is NOT proven, mainly because its ridiculously ineffective. Actually that goes for all cryptocurrencies.