Hi Marie1uk,
IMO, any branch a developing tree decides to lose only adds to the design if looked at with the right eyes and understanding. Trees in nature, yamadori, gain their highly-prized beauty by just such events, which lie beyond the beauty our human minds may try to impose on them. Having worked with yamadori for a few years now, and with an entire collection that half-died when I moved to a very harsh climate for a few years, I just take such things in stride now, and see them as challenges to make the most of.
Cryptos are some of my favorites for a certain kind of project. They grow very well here, and there are little mom-and-pop nurseries where the owners grow them from seeds or cuttings and never tend them. Growing wild like that, they WILL backbud down low, and thereby make great bonsai material - BUT, they will NOT backbud through the usual machinations that work for other bonsai species. Some other conifers have the same habit. I think it has to do more with the high volume flow of nutrients and sap up and down at the base when a tree is growing rapidly, which somehow stimulates the back budding, whereas trying to force it by cutting growth at the top only defeats the purpose in these species.
Your tree is in the ground "developing," yet clearly not being allowed to grow freely to develop the base, which is the usual purpose for that stage of a tree's development. It already has a nice base if I am correct. It seems it may be better served in a grow pot at this phase. There may be, however, some possibility of inducing back budding down low if it is allowed to grow grow freely again for a number of years, but that may be a long term project, and not on e with guaranteed success.
For inspiration, since I think your tree has potential along these lines, you may enjoy the images below of three cryptos I developed from nursery trees here, trees of the sort I was talking about above. The first one I gave away to my neighbors for their 25th anniversary; the second - the least attractive of the lot - I gave to another practitioner at this early stage in its develoment; and the third is a photo from two years ago of the one I have left - looks even better now after two years of neglect, but I haven't got around to taking a picture. These show a style reminiscent of the redwoods and sequoia here in the US, for which cryptomeria are very naturally suited. A jin or break in the foliage - such as your tree now presents - fits in very well with this very natural style of tree.