There is nothing like 100% lost in bitcoin because bitcoin has never dropped to zero and at that, you may lose a fraction when you do dollar cost average but then if you hold your Bitcoin you lose nothing.
-dont have a misunderstanding in the word (crashed) because I can see that you misconcept it and aligning it to Bitcoin is a little out of context.
-investing 60% of your saving is not a bad idea but then you should try to get an entry price so that you will not be under pressure when the price goes against your predictions.
People have high hopes when it comes to btc investments.
And yes, i do agree with you as nothing like 100% lost in this top alt, unless it will go to zero value, but it is not.
Her investment into btc is quite a big percentage of her savings. She can invest in btc at staggered periods, with different price levels.
The preference about the percentage depends on the capability of the user, how she can tolerate possible losses on the based of her entry.
She can invest at any time, so long she believes on this market, and not agitated to cash out whenever there is a sudden drop from the price.