Although it appears that the Bible (also known as the Holy Scriptures) appears to speak about itself in verses such as 2 Timothy 3:15-17 and Hebrews 4:12, there are deep problems with the conclusion...
It isn't. The word 'Bible' means 'book' and comes from the Greek 'Biblos'. When the Bible was written it was made of individual books - or rather scrolls - that were hand written and copied and used...