Why I bet Bitcoin will perish in 3 Years : Prove me wrong if you can/Let me know what coin you think would survive.

Airlines don't use the prototype flying machines and that's for a reason. No matter how much you improve a Diesel Train, there is always a solid hard cap that exists simply because It's a Diesel locomotive. There are certain thing called birth defects. The kind of defects that cannot be overcome with any amount of hard work or improvements. Twitter, Vine, Snapchat, retail, Lending Club.... all these have birth defects hard-coded into them. They can and will not achieve sustainable long term success. Dash has no [real] competition. There are other great blockchains offering great services like Etherum, Sia, Maidsafe, Factom, Steem etc. and nothing that spring forth from Buttcoin will ever have long term sustainable worth.

Still I'm all in for cashing in on bubbles.

When Bitcoin was first created, it was touted as a peer-to-peer electronic cash system. Since that time, Bitcoin has evolved into more of a store-of-value than a cash system. BTC is full of poorly aligned incentives. For an example, the miners wouldn't really benefit from increased block size. Restricted block size is what is causing or driving the cost of Bitcoin transactions to zoom up and up and up. Profitable for miners, but bad for users.

The team and community behind BTC has continuously showed toxic behavior and inability to make any sort of decisions in a fast and effective way. Any blockchain tech should be balanced by using economic principles to maximize efficiency, not just technological improvements. For an example Dash is already set to support block size increase up to 400MB while the ancient prototype coin has barely been able to do anything after years of debate.

Cryptocurrency communities can devolve into hostility as various actors, without ownership or control over certain aspects of the space, fight over influence and control. Buttcoin is a glaring example of this along with Monero (Which doesn't even offer any privacy to transactions between 2014-2016 https://cointelegraph.com/news/monero-transactions-history-can-be-revealed-and-exposed-research)
https://www.dashforcenews.com/bitsquarebisq-add-dash-base-currency-soon-faces-boycott-threats/

One does not discuss the possibility of finding chastity in a brothel. Similarly one should not discuss the future of bitcoin.
Do not support BTC! It will only slow down the progress to a better world because of all the pipe dreams and complete lack of long term planning from the Buttcoin advocates. BTC is toxic (and to a lesser extent, Monero) to the Blockchain space and it has become a Tragedy of the Commons.
https://www.dashforcenews.com/greg-maxwell-wrong-altcoins-several-different-angles/

Long live currency competition!