Get your degree.
As mentioned before it is a foot in the door. Plus it opens doors throughout your life. An engineering degree is not only a stepping stone, it is also an insurance policy to some extent.
Billy Joel dropped out of school but is worth $180 million. He went back and completed his high school diploma not long ago because it was something he had to do. He earned great admiration in doing so. When you earn your degree, you will have something that even Bill Gates cannot buy even with his $79 BILLION dollars. Gates is a drop-out, but he could go back and completes his degree if he wanted to. You never know, Gates might learn something as well be earn his degree.
You can lose you house in a fire, you can lose your family and all your worldly possessions, but you can never lose your qualifications. They are with you for life. Even those who have lost the faith and pursued some other career, still have their qualifications and letters after their name.
This all being said, there are people who earn an engineering degree but are hopeless. And there are people who don't have an engineering degree who have leave some degreed engineers for dead with their superior skills, knowledge and passion. Some companies will not hire anyone as an engineer unless they have that piece of paper - it happens in Australia but more so in the USA and maybe in Germany. Which is unfortunate, but that is the reality.
In any case, get your degree. You will not regret it.
As for those certificates, like Matlab etc, keep them. When you submit your resume for your first job, attach them. It might give you the edge in getting the job.