C. Long-term holding
This form is often applied for your trusted long-term coin/project. You can buy and wait until the market is saturated or when the trend becomes clearer. This is a true investment, constituting high risk and little chance of success. However, a good project will surely pay you back.
If you bought good coins from top projects, your chance to get profit is much higher than from low-cap unknown projects. Make full research of project before to buy coins for long-term holding.