No it's not. They aren't thinking much on the brighter side. There are lots of scam today but no one will be scam if they will not allow themselves to be scam.
Bitcoin is money so better they know the risk of investing elsewhere.
Yes, you are right, because recently bitfinex has been hacked, and it is not first time even it is more than one, but people never hate to bitcoins, and also those people who have a lost their amount in Bitfinex exchange, but they are still using bitcoins, but only the way of saving will be changed. Everyone know that it is a time of crypto currency and it is a easiest way to make profit and everyone can earn from crypto currencies.
The bitcoin price was quite high before the Bitfinex hack. Now the price is only $555. so it is good to buy some.