When making an investment, what we should first consider is our income level, what percentage of money do we earn on a basis and how much are we willing to begin the investment with, what strategy is best suitable for us in making this investment and how we are going to overcome the aftermath on this investment in balancing through the economy challenge and the needs that may arises, how all these are not going to affect the investment and how wea re going to be sustainable in making same investment without any thing left undone or being affected, proper and adequate planning is very important to be in place before the start of an investment and choosing the right asset is also an important thing never to left behind.
Yes, all what you said is correct. We do not need jump into investing without making good calculations of our cost of living, our savings/emergency funds and other minor expenses, if we don't then there is certainty of becoming affected after making the investment which may result to the urge of tampering one's portfolio. It has been drawn to the best of our knowledge to adhere to the rule of investing not aggressively but passively, this way we don't get to regret.