Technically bitcoin was worth less than 10 cents per bitcoin upon its inception in 2009.
The cryptocurrency has risen steadily since then and its worth now about $8000.
Its ATH value is $20000 something per bitcoin. This is the remarkable appreciation of the value and has created many millionaires over the last 9 years.
Here is the list of top 5 Bitcoin owner/institutions which is given below.

1: Satoshi Nakamoto

The creator of Bitcoin, who hides behind the moniker Satoshi Nakamoto remains the major bitcoin holder.
The number of bitcoin which he has is 1.1 million based on the early mining that he did before.
This is equivalent to 88 billion.

2: Bulgaria

Bulgaria is currently sitting on one of the biggest stashes of bitcoin in the world. A crackdown on organized crime by the
Bulgarian law enforcement in May 2017 resulted in the seizure of a stash of 2193,519 bitcoin enough to pay off a quarter of the countries national debt.

3:Bitfinex

Bitfinex, a cryptocurrency exchange has one of the largest bitcoin wallets with 163,133.39 BTC that are worth approximately $1305067040. The coins are believed to be kept in cold wallet to protect them from cyber hacks, unauthorized access.

4:FBI

In 2013 Dread Pirate Robert-the operator of the illicit online marketplace, who they say is an American man named Ross Ulbricht, they have 144,000 bitcoin in his wallet.
FBI seized this wallet because this bitcoins are generated by selling drugs.
This online site holder received payment in form of bitcoin.
Now FBI has 144,000 bitcoin in his wallet may be then more and the worth is $1152000000.

5:The winklevoss Twins

Tyler Winklevoss and cameron winklevoss were among the first bitcoin billionaires.
One interesting information about twins is they gave the idea of creating Facebook to Markzakerberf.
They gave the idea to develop the connectU site, which was to become Facebook later on.