The only thing I really not test on crash is when it is on automatic mode and martingale because I feel like this kind of thing do happens as well as on dice. I think that's normal but for someone who are new and experience betting on it with high multiplier will really freak out especially if they are huge bettor. Moreover, as I recall I only experience around 9 or 10 lose streak in the history of my betting and yeah might be too much to handle a 14 red streak on a crash game.
All kind of strategies will not work in any kind of gambling games. If you are playing too long, you will lose too in long run because there is house edge (playing with autobets and running it for day/few days).
Let assume you started your bet with 1bits (1 bit = 100 satoshis in bustabit) and use martingale strategy, 1,2,4,8,16....until 14th bet with 8192 bits and still lose, when you lose 14 bets in a row, you already lose 16,383 bits or 0.016383 btc, let say you still have enough balance to cover your next bet, it's means you are going to bet 16,384 bits or 0.016384 btc on 15th bet , if the bet win, you are only profited 1 bit or 100 sats (really not worthy comparing your high bet).
Your total bankroll must be 32,767 bits or 0.032767 btc to able cover 14 streak losses in a row with 1 bit as base bet.