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The image below is BTC/EUR on Coinbase. The MA 150 ( days) seems a very good long term support. Since 2016 the BTC/EUR pair hasn't breached the support. Except for some occasions, but overall it holds pretty well.
I just want to give my humble opinion on some products by doing technical analysis. There may be some minor and/or major flaws. Nobody is perfect and I'm willing to learn from my mistakes through your opinions. Thank you.
https://steemit.com/money/@bo3ia/how-to-make-money-in-stocks-and-cryptocurrencies
Image source: https://www.tradingview.com/
Disclaimer: This is not financial advise.