Do you have a peace of mind after buying shares?

Do you have a peace of mind after buying shares? If you don't, it is possibly due to one or more of the following reason?

1) You are speculating. You buy because the shares keep going up without reasons, hoping that the shares price will go up somemore.

2) You are buying shares of the companies, without even knowing the fundamental of the companies. You buy just because of the influence of the analyst, your friends or colleagues.

3) You are using someone else money.

4) You are using money that you cannot afford to lose.

5) You invest too much money at one time, and left no more money to invest when market goes down again.

6) You are leveraging. There is a possibility to lose more than your initial investment amount.