A free, simplified version for basic video tasks.
The most immediate danger is the high probability of malware. Crack files are often used as "Trojan horses" to deliver ransomware, keyloggers, or spyware onto a system. Since these files require you to disable antivirus software to run, they leave your personal data and hardware completely exposed.
Students and teachers can often get the full Creative Cloud suite at a 60-70% discount.