I can't sleep

I am facing this problem for few days. My problem is I cannot sleep well. I have tried to figure out what causing me what is preventing me from good sleeping. But unfortunately I haven't figured out any valid reason which may disturb my sleep.

I go to bed at late and can't sleep properly. Sometimes I see bad dreams on my sleep however I cannot wake up at early. I know waking up from sleep at morning is good for health and getting early to sleep is also good for health. But situation is not in my control.

I haven't changed anything to my lifestyle including my food habit. I take tea which contains caffeine only once a day so I think it's not the thing that preventing me from sleeping.

Is it Crypto that disturbs me all the night. I think if my portfolio is green I can sleep well.