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As many others the value of any coin is Volatile if the project is good you can surely relay on that. BTC is designed to be like gold little ups and downs with market. Yes you can trust BTC in longer run

Every Currency in the world is only as reliable as the confidence in use & acceptance. I was late to BTC, even though I was introduced to it at below $5.00. I can say now that my lack of confidence didn't slow it down so, why would I be less convinced now that I'm on board, right?

Bitcoin is not safe as old timel..bitcoin is no more only mother ship..other coins going to introduce their own block chains..so may it going to hurt bitcoin price in near future

I believe so brother. More than our dollar currency that collapses all the time.My opinion Have a good day!!