if you want to earn a high income you have to be at high risk like the one in the bitcoin forum where people are very much to invest in it and it must be very big capital by buying a high 1BTC price or investment in ETH.
Any investments take risk and when you put all your money on it, you take big risk because you either earn good profit or lose when the price goes down more but you cannot hold any longer to wait for recovery. Invest on something that has potential for growing along the market.
Surely it is. When you do not have the guts to take risk then probably you will not going to earn something. You need to face something in order to get also a reward. In this way, you word hard and get incentives. Risk is part of investment it varies only in the level of risk you are ready to take. It must be Higher Risk, Bigger loss or Bigger outcome.