Lets put some rational arguments regarding circumstances of possible Bitcoin crash and when would that commence:
1. Current situation may resemble Dutch "tulip fewer" of XVII century. If so, then this giant bubble will certainly go pop! with many usually young and inexperienced investors bashed badly.
2. Regulatory environment could easily turn against Bitcoin, due to its utility for tax and capital control evasion, money laundering, financing criminal activities etc. International agreements can be reached to interrupt/stop processing bitcoin transactions. ISP could face heavey fines and other other troubles for merely allowing their infrastructure to be used for sending/receiving bitcoin payments. Online exchanges can be outlawed and closed. Users can be prosecuted etc. That would relegate bitcoin to criminal underground and its value there is uncertain. If tranferring of bitcoins over Internet is successfully interrupted/eradicated due to some sort of filters (which would only need to determine that particular stream of data is actually bitcoin, no need to decrypt the code to seize assets) bitcoin would lose its utility and collapse to zero.
3. Global banking cartels could pump up bitcoin to $1million and more each or to any other suitable level, cash in profits and dump it to teach the mob that it is not worth to invest in any sort of "alternative money".
4. Due to increasing global tensions Internet could be splitted into a number of "mininets" with very little if any communication between each other and such situation allowed to spend the same bitcoin several times. At this point bitcoin is dead like a dodo.
5. Quantum computers (which already exist) got better and factorizing large numbers became trivial task. At this point bitcoins could be intercepted and seized in transit and that would be it.
6. Something better was devised and current edition of cryptocurrencies became obsolete.
7. Ivanka Trump was kidnapped and ransom have been demanded in bitcoins. It could be even false flag operation. That would be it.
8. Alternatively, who knows, maybe bitcoin is not at all gaining its value only dollar and other mainstreem currencies are collapsing? Maybe within few years bitcoin will be worth $ trillion but box of matches too?
Welcome to discuss/refute this points or offer alternative vievs including those proposing that bitcoin will never collapse.
Martin