The End Of Bitcoin and crypto?

somehow in the next 4 or 5 yrs, it will be the end of bitcoin and the crypto not because we have reached to the higher level of the difficulty that the process of creating new bitcoins is no longer possible no but it is worse

what will I talk about today?
.
.
.
.
.
.

it is called "Quantum computers".
.
*

Quantum computers, first theorized by physicist Richard Feynman in 1982, have promised a new era of computing. The theory has only recently translated into significant real-world advances, with NASA, the CIA, and Google working on a quantum computer. Computer scientists now warn the machines will cripple existing encryption methods and destroy bitcoin’s technological foundations. why?!
let's talk about what it capable of .... quantum systems will do things not possible on today's computers, like discovering new drugs and building molecular structures. Today's computers are good at finding answers by analyzing information within existing data sets, but quantum computers can get a wider range of answers by calculating and assuming new data sets.
to be able to understand ..... our computer processing the information as 1 or 0 or we can say right or wrong but the quantum system is different and weird the information can be 1 or 0 and 1 and 0 at the same time ......okay..... 1+1=2.... but for quantum systems can 1+1=anythings so what!!!!! right? ... it is not a big deal ..... wrong with this kind of system you can forget about your password, privacy and your Bitcoin wallet security system they will be all hacked in seconds.

What Can Be Done?

To protect bitcoin from quantum computers, new cryptography standards must be incorporated into the bitcoin protocol. Such technologies exist already. Llew Claasen, executive director of the Bitcoin Foundation, said many cryptographers already are working on a solution to phase in quantum-proof technologies to the bitcoin network.

The question will be in deploying them.

Bitcoin has doomed Any disruption that requires the bitcoin community’s consensus, something that can’t even be accomplished with the cryptocurrency’s transaction limit problem. The transaction limit problem is simple compared to reworking the complete digital signature method.

the info: https://en.wikipedia.org/wiki/Quantum_computing
https://www.cryptocoinsnews.com/quantum-computers-will-destroy-bitcoin-scientists-warn/
http://www.pcworld.com/article/3180194/hardware/with-quantum-computers-here-developers-seek-uses.html
*By D-Wave Systems, Inc. - D-Wave Systems, Inc., CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=10722194