Step 1:
The backside of this paper is completely white. Prefold over these 2 lines, then turn the paper.

Step 6:
Repeat steps 2 to 5 in this direction.

Step 5:
Unfold the model

Step 2:
Valley-fold over these 2 lines.

Step 4:
And valley-fold over these 2 lines

Step 3:
Valley-fold over these 2 lines

Step 10:
Push the edges indicated by the 2 arrows inwards by making an inside reverse fold over these 2 sets of 3 lines. (=mountain-fold over the short line in the middle and a valley-fold over the 2 outer lines)

Step 8:
Valley-fold over this prefolded line. The corners indicated by the 2 arrows are pulled upwards when you make this fold.

Step 9:
Press the places indicated by the 2 arrows flat

Step 7:
Now the paper has all prefolded squares. Use them as guidance for the next steps.
Fold over these 4 prefolded lines

Step 16:
This is a topview again

Step 15:
Push the edges indicated by the 2 upper arrows under the edges indicated by the arrows below

Step 12:
This is a topview of the model

Step 11:
Valley-fold over these prefolded lines. The numbers in the picture indicate how many squares wide each part is.

Step 14:
Pull the edge to the left by making a valley-fold over the line on the left and a mountain-fold over the line on the right.
Do the same on the other side of the piggy bank

Step 13:
Press the layer indicated by the arrow upwards, against the layer above. Then make an inside reverse fold over these 3 lines (=valley-fold over the line in the middle and a mountain-fold over the 2 outer lines). Make these folds over both layers in once.
Do the same on the other side of the piggy bank

Step 21:
Repeat step 20 on the other side, see arrow

Step 19:
Now the model looks like this

Step 20:
Mountain-fold over these 2 lines

Step 18:
Fold the piece indicated by the large arrow to the inside too (make this fold on the same place as the folding line indicated by the small arrow)

Step 17:
Mountain-fold over these 2 lines

Step 22:
Curl/bend/fold the tail upwards

Step 28:
Now the model looks like this from above.

Step 25:
Fold over these 2 lines, do the same on the other side

Step 26:
Now the model looks like this

Step 24:
Make the same sort of folds as in steps 17 and 18 on the head

Step 23:
This is the other side of the model

Step 29:
Mountain-fold over this line, do the same on the other side of the head

Step 27:
Push the head inwards from aside by making folds over these lines

Step 30:
Mountain-fold over this line, do the same on the other side of the nose