After crocheting the last stitch, we do a chain stitch to secure the piece.
We can use a needle to hide the yarn. Thread the yarn. Find a loop close to the yarn tail. Use the needle insert in this loop and insert some loops. Bring the yarn through the holes.
In the opposite direction inserts some holes. Pay attention, we do not insert the same loop we came out of but skip this loop. Then we insert some loops at one time and through. Finally, we cut off the yarn close to the piece.