In 2013 to 2014, Bitcoin crashed from $1000 to $200
From 2016 to March 2018 Bitcoin was:
$1,000 to $20,000
$20,000 to $6,500
$6500 to to $12,000
$12,000 to $7,500

Bitcoin is the most "feared investment" after going up from $1 to $10,000 in 9 years and big names saying bad things for Bitcoin and cryptos
Yes, it fluctuates, it's not stable. But to are most fiat currencies. So what's all the panic? Take is slow, learn, don't gve into panic and you'll be good.