7. Storing bitcoin on exchanges. When bitcoin is on an exchange, you don't own it, the exchange does and you have an IOU. Given the number of hacks of exchanges over the years, storing bitcoin there is a poor choice.
7. Just remember, if you do not hold your banana guys, you are trusting another man holding onto your banana, This defeats the purpose of bitcoin.
The most common way people lose their bitcoin, is not being their own bank.
Exchange: Silk Road
Amount: $270,000,000 (171,955 BTC)
Exchange: MtGox
Amount: $700,000,000 (850,000 BTC)
Exchange: Cryptsy
Amount: $9,500,000 (13,000 BTC and 300,000 LTC)
Exchange: Mintpal
Amount: $3,200,000 (3,894 BTC)
Exchange: Bitstamp
Amount: $5,100,000 (19,000 BTC)
Exchange: Bter
Amount: $1,750,000 (7,000 BTC)
Exchange: Bitfinex
Amount: $72,000,000 (120,000 BTC)
Exchange: EtherDelta
Amount: $266,789 (308 ETH)
Exchange: Yapizon
Amount: $5,500,000 (3816.2028 Bitcoin)
Exchange: Bithumb
Amount: $7,000,000 (in BTC and ETH)
Exchange: OKEx
Amount: $3,000,000 (in Bitcoin)
Exchange: Coinis
Amount: $1,800,000 (Unknown)
Exchange: Nicehash
Amount: $60,000,000 (4,000 BTC)
Exchange: Bitstamp
Amount: $5,000,000 (18,000 BTC)
Exchange: Coincheck
Amount: $534,800,000 (523,000,000 NEM)
Exchange: BitGrail
Amount: $195,000,000 (17,000,000 NANO)
Exchange: CoinSecure[1]
Amount: $3,300,000 (438 BTC)
Exchange: Bithumb
Amount: $31,000,000 (in Ripple)
Exchange: Zaif
Amount: $60,000,000 (5,966 BTC)
Exchange: MapleChange
Amount: $6,000,000 (913 BTC)
Exchange: Pure Bit
Amount: $30,000,000 (ICO + 13,000 ETH)
Exchange: HitBTC
Amount: Unknown (A daily volume over $200 million)
Exchange: Cryptopia
Amount: Significant losses (Atleast 19,390 ETH)
Exchange: Coinmama
Amount: 450,000k user emails and passwords
Exchange: Binance
Amount: 7,000 BTC
There is more, but let`s just learn from these ones and from the first sentence of the white paper.
USD/EURO IS A FINANCIAL INSTITUTION, THE EXCHANGE IS A FINANCIAL INSTITUTION, TRUSTING A 3RD PARTY IS NOT P2P!