You can buy bitcoin at coinbase.com or find a legit seller at localbitcoins.com. You can also buy bitcoin to a people directly who sells bitcoin. One of the safest way to keep your bitcoin out from hacker is using a hadware wallet like ledger nano or trezor wallet. Offline storage is the best bitcoin wallet.

You must buy cryptocurrencies that has established a whitepaper and secured blockchain. One of the best is Ethereum! Let me add that the Propthereum ICO crowdsale will run off a decentralized Smart Contract that runs on the Ethereum Blockchain. It is secured with a 256-bit encryption which makes it secure and reliable. Propthereum Tokens will be minted as PTCs. These coins are a digital representation tracking the funding of our ICO and crowdsale. The pre-ICO token sale will take place on November 10, 2017 at 12PM GMT. You may check this link for more information: www.propthereum.io

This is really hard to tell and very subjective for me. There's no such thing as "safest". It's still on us users how we protect, secure our own wallet. In my case I only use online wallet. I am afraid of using private keys as I am not good storing codes. Check which wallet is very reputable in your country. We have one here and it's the one I've been using since I first purchased BTC. I tried exchange as well when I was starting to trade but upon reading here, there are some shady incidents of lost BTC stored in exchanges, not sure who are the ones saying true, but just to make sure, I moved all to my online wallet with 2FA activated.

it's true, we have to buy or sell bitcoin on a trusted site, if we only use the site that originally likely to create a problem, on your account.

There are a lot of stolen wallet, is not because of the use of safety awareness caused by. The safest way to use bitcoin wallet of course is to use cold wallet. As long as you don't get to the Internet, hackers will not get your password. But the price is very high and cold Wallet

The best way to buy and hold BTC is like this... Buy them from peer to peer exchanges where you have to give the least amount of info, but still use privacy features like two factor authentication and escrow transcations, like localbitcoins.com does. Then use privacy wallets like Samourai Wallet which has an insane amount of privacy features, most you've never even heard of or thought of.

just only watch in the market or in the blockfolio and etherdelta.

First thing: Use an offline wallet like Electrum
An offline wallet like Blockchain or an echanges wallet like LocalBitcoin, is unsafe, because they can close their site and take all the BTC, or can get hacked

Scam is fast way to earn  (you will earn less in future )If you do not develop yourself and become the smartest, or if those who defraud them, develop themselves and become smart, then your income will be zero.
ref link also fast  (you will earn littel in future )You need to provide powerful content like YouTube channels and others.
super ability can make you get bitcoins fast (a lot of work but will get a lot of bitcoins )