It's called a calculated guess ...

so, you should start here;
it's the big picture for the next 12-18 months; an upwards 5 leg wave

so, now I'm zooming in,
I went from the weekly to the daily chart first,
and now this is the 4 hour chart

I'm not going to explain in detail, because this is just an exercise
I'll look back at it tomorrow and then I start tweaking it ...

it does look like leg 2 has started, which means it will go down,
always hard to guess how low, but it should be obvious when leg 3 starts

save up now, or short, wait for the bottom of leg 2,
buy a bit, look again, buy a bit, wait, buy a bit ...

and at some point you just go; f'k it, I'm all in ...
and then you can't sleep for 9 months or so, but by then you must have at least doubled your money ... promised

PS; this is financial advice, but you can only sue me for your losses, as long you first pay me for the consultation !!