Because of the value of Bitcoin, people will hoard it,
Take me as an example. I will invest 20% of my salary in Bitcoin because I think Bitcoin is very valuable and I believe in Bitcoin, so I think Bitcoin is worth investing in.
But if you let me buy something with bitcoin, I will hesitate and pay with fiat currency first.
Although people can pay in any way, will Bitcoin be your first choice?
Now the difference between fiat currency and Bitcoin is that one is inflation currency and contraction currency. Inflated currency (fiat currency) means that if it inflates, you want to get rid of it as soon as possible. For example, we use fiat currency to buy things, invest in real estate, cryptocurrency, stocks. And to shrink the currency (Bitcoin) you buy goods or services, or hoard it. This has no effect on the economy, except to reduce the monetary base and make the currency more scarce, so deflation is faster.
In my opinion, Bitcoin is a store of value, not a currency. There may be cryptocurrencies becoming legal tender, but not now, volatility and supply and demand need to be considered.
People keep on eyeing bitcoin because they know its potential and they trust it will have a higher value in the future. I am one of those people that believe so much in what bitcoin has to offer in the present and in the future. Bitcoin has already proven its strength over the years now. It has shown its potential and it has already withstood the test of times which most currencies fail to do so, hence the latter often die out later. Bitcoin survived all the bad things thrown at its way such as it being associated with schemes and scams which is definitely false, but often heard and seen most especially in mainstream media.
In addition, the bitcoin count in circulation is limited. This coin is very scarce that is why it is safe to inflation like most people say, just like with gold. Hence, its value tends to go up and up as time passes by. There are also many investors entering and putting their funds on bitcoin which makes the demand higher that leads to bitcoins value to pump. I totally understand people that want to invest as much as they can in bitcoin because it is a safe haven for storing funds, what can you ever ask for right? However, also be reminded that bitcoin isn't a get-rich-quick-scheme like most people assume. This type of investment requires vast knowledge and capital, of course, to be able to start. So, like any investment vehicle, always invest at your own risk. Risk only what you can afford to lose so you won't lose your mind the moment unfortunate events happen.