A recent security evidence was reported this month indicating that there are no backdoors in Truecrypt that are used for the sake of illegal spying but there are some security weaknesses that are open to cyber-attacks by cyber-criminals. It’s not that the serious weakness or lack of security strength has lured those spies away. It’s that the developers gave up for unknown reasons. Many thought that the website or the app itself was compromised or something or maybe they found out that those backdoors as I mentioned were in that app that they felt betrayed.
Based on the evidence, if you want to keep using Truecrypt, you can go ahead with that despite the warning of the security flaws and especially that you want to use the derivatives like Veracrypt for instances in which those similar flaws are there as well.