To the bitcoin holders sudden crash and volatility means opportunity and profit. To the early adopters way back to 2013 when we speak of sudden crash it would cause a big panic and many will lost their capital. But today bitcoin holders are no longer affected by sudden volatility. If they see a huge price spike it would mean time to sell and if they see a huge dip it would mean an opportunity to buy.
Yes there are people who are loving the extreme volatility of bitcoin markets. They must be traders who can enjoy the ups and downs of bitcoin price movements to make use of them for their trading.
But when we are thinking from the point of innocent investors who are entering into bitcoin and losing their investment with sudden crashes, might be leading to have negative impression about bitcoin investment and which may end up not suggesting to their friends to guide them getting into bitcoin ecosystem.
Hence I think we need bitcoin prices to be more stable like it should move up to +/- 10% per day. But I do not think it would be possible to have such ideas to be implemented.
I agree that volatility is bad for a currency used to transact. As Dinofelis said, cash with a finite supply is inheritly volatile. Fiat is able to control giant swings with policy changes & fresh currency, this is something that bitcoin seeks to avoid. We can't add mechanisms for price control and then in the same breath call Bitcoin a "freely traded market", which imo is one of the more appetizing features of BTC.
I think the adage applies here "don't invest what you aren't willing to lose".
That being said, I definitely think it's a mistake to dislike volatility (speaking being we are all here for profit). It's more the natural progression of a trend, look how slow price started rising from $200 and how volatility (ups & downs) progressively got bigger and bigger as price rises. This is something we see repeat in nearly every market. A good example is a 10 year graph of Amazon/Google, look how slow it started and how it's basically going straight up now.
It's more about people feeling they are on the "sidelines" and buying in so they don't "miss out". Little do they realize, they were buying at the top before a very large correction. There is a reason most profitable traders on Wallstreet are contrarians. The goal is to use human psychology against your peers.
Bitcoin to me is a vehicle for speculation now a days, nothing more. If we want to talk global currencies, we got to start USING them as global currencies. Right now it's just a hoarding game.
As most people say "smart money buys bitcoins, dumb money sells bitcoins". That's a self-fulfilling prophecy for continually rising prices. That's NOT how a currency is supposed to be used, if anything we use Bitcoin more like Gold than a currency. It's a really volatile store of value (oxymoron lol)
PS - as a trader, I love the volatility, as I'm sure many of my peers do. Bitcoin has made me some of the greatest pecentage gains over the years.