We know that four way to cryptocurrency income such as Invest ico, mining, trading and Airdrop-bounty. If you wish, you can do any of that.
If you want to mining or invest in ico and need a lot of money, it has cost-effective risks and have also profits. And if you want to do trading then you can start trading only if you have some money. Here's a little less risk and have also profit.
If you do not want to take a risk then you can start the bounty. There is no risk here only you will have to work on time and you will get your payment at the end of the job. As a payment, you can get cryptocurrency and convert them into meaning by selling them. So, I think Bounty and airdrop is very good for earning risk-free cryptocurrency profit.
Partially agree. Yes, for mining you will need a lot of money, additional devices, etc. But it has nothing to do with investing... You can start investing and get profits even with a small sum. Your safety actually depends only on you. If you follow certain rules to minimize risks, then you shouldn't have problems. For example, if you have a hardware wallet for storing your funds and chose a well-known and trusted exchange like CEX or Coinbase, you'll likely to earn something. CEX accepts cards and wires payments which allows not only buying but also exchanging coins. Say, you can exchange BTC for DASH (
https://cex.io/dash-btc) or ZCASH (
https://cex.io/zec-btc).