While signs and wonders were part of the fulfillment of scripture to validate the identity of the messiah.
Notice that after Jesus, signs and wonders followed them that believed and were a confirmation of the Apostles preaching
While God still works miracles through the power of the Holy Spirit, Jesus said that a wicked and adulterous generation seeks after a sign.
In the future, the anti-christ will use lying signs and wonders to draw people away to hear a false gospel.