Is it possible to use ESP32, BLE4 or BT 2 and WiFi same time?
There is only one antenna/radio unit but it is possible to use the special option "Software controls WiFi/Bluetooth coexistence" to allow both protocols to be used within the same system. You can quickly run into issues if you are trying to have a high throughput or low latency but from the espressif FAQ: 


  "At the moment, ESP32 can simultaneously function as a Wi-Fi module
  and as a Bluetooth speaker, playing music smoothly"


For more details see section 5.3 on Coexistince from the Espressif FAQ:
https://www.espressif.com/sites/default/files/documentation/ESP32_FAQs__EN.pdf

If you expect to have fairly high throughput and require low latency for near real-time data you may want to explore using an external bluetooth module like the HC-05 (master+slave) or HC-06 (slave only) for bluetooth communications and enable only wifi on your base ESP32 device.