δεν ξερω ποσο "σωστη" ειναι η αναλογια του btc με τις κλασικες μετοχες (ειδικα τις ελληνικες!)
ειναι σαν να προσπαθουμε να κατανοησουμε το θεο με ανθρωπινες αξιες!  
το ρισκο φυσικα υπαρχει σε ολα, μη ξεχναμε και τη βουτια απο τα 1200 --> 200  
οσο για το brexit, Θα βγει η βρετανια (στο καλο να παει, αυτοι εχουν ακομα βασιλιαδες, για ονομα!!!!)
και θα μπει η ρωσια! το φανταζεστε? 

Summary of findings
• We show that selfish mining is not always a rational strategy.
To capture rational adversaries, we therefore quantify the
double-spending resilience of PoW blockchains and objectively
compare the security of different PoW blockchains with
respect to the required number of transaction confirmations.
By doing so, we provide merchants with the knowledge to
decide on the required number of confirmations for a given
transaction value to ensure security against double-spending.
• Our results show that, due to the smaller block rewards and
the higher stale block rate of Ethereum2
compared to Bitcoin
(from 0.41% to 6.8% due to the faster confirmation time),
Ethereum (block interval between 10 and 20 seconds) needs
at least 37 confirmations to match Bitcoin’s security (block
interval of 10 minutes on average) with 6 block confirmations
against an adversary with 30% of the total mining power.
Similarly, Litecoin would require 28, and Dogecoin 47 block
confirmations respectively to match the security of Bitcoin.
• We show that the higher the block reward of a blockchain (in
e.g., USD) the more resilient it is against double-spending.
• Finally, we analyze the impact of changing the block size
and/or the block interval on selfish mining and double-spending.
Our results surprisingly show that setting the block size to
an average 1 MB, and decreasing the block interval time to
1 minute do not considerably penalize security. Our results
therefore suggest that PoW blockchains can attain an effective
throughput above 60 transactions per second (tps) (which
implies that the current throughput of Bitcoin of 7 tps can be
substantially incre

I sent money from my circle account 163$ worth of BTC and It's been 2 days I have yet to see it in my Bitcoin Core wallet I downloaded I'm new to the program if  someone could help me that'd make me feel so much more at ease I am kind of freaking out right now 

95% of the last 2016 blocks since the last difficulty adjustment must signal CSV.
As a maximum, only 100 of the 2016 blocks can be non-CSV.
If the above criteria are met within the current 2016 block cycle, activation of CSV can happen in less than 13 days.
The first block for this cycle is #415296.
As at block 415484 only 17 blocks were non-CSV.